diff --git a/.idea/caches/build_file_checksums.ser b/.idea/caches/build_file_checksums.ser
index 4d8407c..9c9d487 100644
Binary files a/.idea/caches/build_file_checksums.ser and b/.idea/caches/build_file_checksums.ser differ
diff --git a/app/build.gradle b/app/build.gradle
index 70affef..de6473e 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -28,7 +28,6 @@ dependencies {
     implementation 'com.android.support:appcompat-v7:27.1.1'
     implementation 'com.android.support:design:27.1.1'
     implementation 'com.android.support.constraint:constraint-layout:1.1.3'
-    implementation 'com.github.msteinbeck:sig4j:1.0.1'
     implementation 'me.texy.treeview:treeview_lib:1.0.4'
     implementation 'com.google.code.gson:gson:2.8.2'
     implementation 'com.squareup.retrofit2:retrofit:2.1.0'
diff --git a/app/src/main/java/ru/volgorobot/vrcatalog/MainContract.java b/app/src/main/java/ru/volgorobot/vrcatalog/MainContract.java
index 4c4a379..89d94b6 100644
--- a/app/src/main/java/ru/volgorobot/vrcatalog/MainContract.java
+++ b/app/src/main/java/ru/volgorobot/vrcatalog/MainContract.java
@@ -4,6 +4,7 @@ import android.content.Intent;
 
 import java.util.ArrayList;
 
+import me.texy.treeview.TreeNode;
 import ru.volgorobot.vrcatalog.additional.NetworkErrorException;
 import ru.volgorobot.vrcatalog.model.CoreModel;
 import ru.volgorobot.vrcatalog.model.DetailModel;
@@ -25,11 +26,21 @@ public interface MainContract {
         CoreModel getCoreModel();
     }
 
+    interface ViewBinderPresenter {
+        void fetchSecondLevel(FirstLevelModel firstLevelModel, TreeNode treeNode);
+        void fetchThirdLevel(SecondLevelModel secondLevelModel, TreeNode treeNode);
+        void fetchDetail(ThirdLevelModel thirdLevelModel);
+    }
+
+    interface ViewBinder {
+        void rotateImageView();
+    }
+
     interface MainModel {
-        ArrayList<FirstLevelModel> getFirstLevel() throws NetworkErrorException, NullPointerException;
-        ArrayList<SecondLevelModel> getSecondLevelByParentID(int parentID) throws NetworkErrorException, NullPointerException;
-        ArrayList<ThirdLevelModel> getThirdLevelByParentID(int parentID) throws NetworkErrorException, NullPointerException;
-        ArrayList<DetailModel> getDetailByID(int detailID) throws NetworkErrorException, NullPointerException;
+        ArrayList<FirstLevelModel> fetchFirstLevel() throws NetworkErrorException, NullPointerException;
+        ArrayList<SecondLevelModel> fetchSecondLevelByParentID(int parentID) throws NetworkErrorException, NullPointerException;
+        ArrayList<ThirdLevelModel> fetchThirdLevelByParentID(int parentID) throws NetworkErrorException, NullPointerException;
+        ArrayList<DetailModel> fetchDetailByID(int detailID) throws NetworkErrorException, NullPointerException;
         void reinitializeApi() throws IllegalStateException;
         boolean getApiState();
     }
diff --git a/app/src/main/java/ru/volgorobot/vrcatalog/MainPresenter.java b/app/src/main/java/ru/volgorobot/vrcatalog/MainPresenter.java
index 8bac518..81a6f77 100644
--- a/app/src/main/java/ru/volgorobot/vrcatalog/MainPresenter.java
+++ b/app/src/main/java/ru/volgorobot/vrcatalog/MainPresenter.java
@@ -33,7 +33,7 @@ public class MainPresenter implements MainContract.Presenter {
             protected ResultWithErrorCode<ArrayList<FirstLevelModel>> doInBackground(Void... voids) {
                 ArrayList<FirstLevelModel> firstLevelModels = null;
                 try {
-                    firstLevelModels = coreModel.getFirstLevel();
+                    firstLevelModels = coreModel.fetchFirstLevel();
                 } catch (NetworkErrorException networkErrorException) {
                     return new ResultWithErrorCode<>(firstLevelModels, networkErrorException.getErrorCode());
                 } catch (NullPointerException nullPointerException) {
diff --git a/app/src/main/java/ru/volgorobot/vrcatalog/ViewBinderPresenter.java b/app/src/main/java/ru/volgorobot/vrcatalog/ViewBinderPresenter.java
new file mode 100644
index 0000000..dc1bdf0
--- /dev/null
+++ b/app/src/main/java/ru/volgorobot/vrcatalog/ViewBinderPresenter.java
@@ -0,0 +1,205 @@
+package ru.volgorobot.vrcatalog;
+
+import android.content.Context;
+import android.content.Intent;
+import android.os.AsyncTask;
+
+import java.util.ArrayList;
+
+import me.texy.treeview.TreeNode;
+import ru.volgorobot.vrcatalog.additional.NetworkErrorException;
+import ru.volgorobot.vrcatalog.additional.ResultWithErrorCode;
+import ru.volgorobot.vrcatalog.model.DetailModel;
+import ru.volgorobot.vrcatalog.model.FirstLevelModel;
+import ru.volgorobot.vrcatalog.model.SecondLevelModel;
+import ru.volgorobot.vrcatalog.model.ThirdLevelModel;
+import ru.volgorobot.vrcatalog.view.DetailActivity;
+
+public class ViewBinderPresenter implements MainContract.ViewBinderPresenter {
+    private MainContract.MainActivityView mView;
+    private MainContract.MainModel coreModel;
+    private MainContract.ViewBinder viewBinder;
+    private Context context;
+
+    public ViewBinderPresenter(MainContract.MainActivityView mView, MainContract.MainModel coreModel, MainContract.ViewBinder viewBinder) {
+        this.mView = mView;
+        this.coreModel = coreModel;
+        this.viewBinder = viewBinder;
+    }
+
+    public ViewBinderPresenter(MainContract.MainActivityView mView, MainContract.MainModel coreModel, MainContract.ViewBinder viewBinder, Context context) {
+        this.mView = mView;
+        this.coreModel = coreModel;
+        this.viewBinder = viewBinder;
+        this.context = context;
+    }
+
+    @Override
+    public void fetchSecondLevel(FirstLevelModel firstLevelModel, TreeNode treeNode) {
+        new AsyncTask<FirstLevelModel, Void, ResultWithErrorCode<ArrayList<SecondLevelModel>>>() {
+            @Override
+            protected void onPreExecute() {
+                super.onPreExecute();
+                mView.swipeLayoutSetRefreshing(true);
+            }
+
+            @Override
+            protected ResultWithErrorCode<ArrayList<SecondLevelModel>> doInBackground(FirstLevelModel... firstLevelModel) {
+                ArrayList<SecondLevelModel> secondLevelModels = null;
+                try {
+                    secondLevelModels = coreModel.fetchSecondLevelByParentID(firstLevelModel[0].getID());
+                } catch (NetworkErrorException networkErrorException) {
+                    return new ResultWithErrorCode<>(secondLevelModels, networkErrorException.getErrorCode());
+                } catch (NullPointerException nullPointerException) {
+                    return new ResultWithErrorCode<>(secondLevelModels, 3);
+                }
+
+                return new ResultWithErrorCode<>(secondLevelModels, 0);
+            }
+
+            @Override
+            protected void onPostExecute(ResultWithErrorCode<ArrayList<SecondLevelModel>> result) {
+                super.onPostExecute(result);
+                switch (result.getErrorCode()) {
+                    case 0: {
+                        ArrayList<TreeNode> treeNodes = new ArrayList<>();
+                        for (int i = 0; i < result.getData().size(); i++) {
+                            TreeNode treeNode1 = new TreeNode(result.getData().get(i));
+                            treeNode1.setLevel(1);
+                            treeNodes.add(treeNode1);
+                        }
+                        treeNode.setChildren(treeNodes);
+                        mView.refreshTree();
+                        viewBinder.rotateImageView();
+                        break;
+                    }
+                    case 1: {
+                        mView.onFailureAnswer(1);
+                        break;
+                    }
+                    case 2: {
+                        mView.onFailureAnswer(2);
+                        break;
+                    }
+                    case 3: {
+                        mView.onFailureAnswer(3);
+                        break;
+                    }
+                }
+                mView.swipeLayoutSetRefreshing(false);
+            }
+        }.execute(firstLevelModel);
+    }
+
+    @Override
+    public void fetchThirdLevel(SecondLevelModel secondLevelModel, TreeNode treeNode) {
+        new AsyncTask<SecondLevelModel, Void, ResultWithErrorCode<ArrayList<ThirdLevelModel>>>() {
+            @Override
+            protected void onPreExecute() {
+                super.onPreExecute();
+                mView.swipeLayoutSetRefreshing(true);
+            }
+
+            @Override
+            protected ResultWithErrorCode<ArrayList<ThirdLevelModel>> doInBackground(SecondLevelModel... secondLevelModel) {
+                ArrayList<ThirdLevelModel> thirdLevelModels = null;
+                try {
+                    thirdLevelModels = coreModel.fetchThirdLevelByParentID(secondLevelModel[0].getID());
+                } catch (NetworkErrorException networkErrorException) {
+                    return new ResultWithErrorCode<>(thirdLevelModels, networkErrorException.getErrorCode());
+                } catch (NullPointerException nullPointerException) {
+                    return new ResultWithErrorCode<>(thirdLevelModels, 3);
+                }
+                return new ResultWithErrorCode<>(thirdLevelModels, 0);
+            }
+
+            @Override
+            protected void onPostExecute(ResultWithErrorCode<ArrayList<ThirdLevelModel>> result) {
+                super.onPostExecute(result);
+                switch (result.getErrorCode()) {
+                    case 0: {
+                        ArrayList<TreeNode> treeNodes = new ArrayList<>();
+                        for (int i = 0; i < result.getData().size(); i++) {
+                            TreeNode treeNode1 = new TreeNode(result.getData().get(i));
+                            treeNode1.setLevel(2);
+                            treeNodes.add(treeNode1);
+                        }
+                        treeNode.setChildren(treeNodes);
+                        mView.refreshTree();
+                        viewBinder.rotateImageView();
+                        break;
+                    }
+                    case 1: {
+                        mView.onFailureAnswer(1);
+                        break;
+                    }
+                    case 2: {
+                        mView.onFailureAnswer(2);
+                        break;
+                    }
+                    case 3: {
+                        mView.onFailureAnswer(3);
+                        break;
+                    }
+                }
+                mView.swipeLayoutSetRefreshing(false);
+            }
+        }.execute(secondLevelModel);
+    }
+
+    @Override
+    public void fetchDetail(ThirdLevelModel thirdLevelModel) {
+        new AsyncTask<ThirdLevelModel, Void, ResultWithErrorCode<DetailModel>>() {
+            @Override
+            protected void onPreExecute() {
+                super.onPreExecute();
+                mView.swipeLayoutSetRefreshing(true);
+            }
+
+            @Override
+            protected ResultWithErrorCode<DetailModel> doInBackground(ThirdLevelModel... thirdLevelModel) {
+                ArrayList<DetailModel> detail = null;
+                try {
+                    detail = coreModel.fetchDetailByID(thirdLevelModel[0].getID());
+                } catch (NetworkErrorException networkErrorException) {
+                    return new ResultWithErrorCode<>(detail.get(0), networkErrorException.getErrorCode());
+                } catch (NullPointerException nullPointerException) {
+                    return new ResultWithErrorCode<>(detail.get(0), 3);
+                }
+                return new ResultWithErrorCode<>(detail.get(0), 0);
+            }
+
+            @Override
+            protected void onPostExecute(ResultWithErrorCode<DetailModel> result) {
+                super.onPostExecute(result);
+                switch (result.getErrorCode()) {
+                    case 0: {
+                        Intent intent = new Intent(context, DetailActivity.class);
+                        intent.putExtra("detailName", result.getData().getName());
+                        intent.putExtra("detailQuantity", result.getData().getNumber().toString());
+                        intent.putExtra("detailPrice", result.getData().getPrice());
+                        intent.putExtra("detailContry", result.getData().getCountry());
+                        intent.putExtra("detailAnalogue", result.getData().getAnalogue());
+                        intent.putExtra("detailDatasheet", result.getData().getDocURL());
+                        intent.putExtra("detailNotes", result.getData().getNotes());
+                        mView.startActivityByIntent(intent);
+                        break;
+                    }
+                    case 1: {
+                        mView.onFailureAnswer(1);
+                        break;
+                    }
+                    case 2: {
+                        mView.onFailureAnswer(2);
+                        break;
+                    }
+                    case 3: {
+                        mView.onFailureAnswer(3);
+                        break;
+                    }
+                }
+                mView.swipeLayoutSetRefreshing(false);
+            }
+        }.execute(thirdLevelModel);
+    }
+}
diff --git a/app/src/main/java/ru/volgorobot/vrcatalog/model/CoreModel.java b/app/src/main/java/ru/volgorobot/vrcatalog/model/CoreModel.java
index 349dded..ccbb53a 100644
--- a/app/src/main/java/ru/volgorobot/vrcatalog/model/CoreModel.java
+++ b/app/src/main/java/ru/volgorobot/vrcatalog/model/CoreModel.java
@@ -31,7 +31,7 @@ public class CoreModel implements MainContract.MainModel {
     }
 
     @Override
-    public ArrayList<FirstLevelModel> getFirstLevel() throws NetworkErrorException, NullPointerException {
+    public ArrayList<FirstLevelModel> fetchFirstLevel() throws NetworkErrorException, NullPointerException {
         if(vrApi == null) {
             throw new NullPointerException();
         }
@@ -50,7 +50,7 @@ public class CoreModel implements MainContract.MainModel {
     }
 
     @Override
-    public ArrayList<SecondLevelModel> getSecondLevelByParentID(int parentID) throws NetworkErrorException, NullPointerException {
+    public ArrayList<SecondLevelModel> fetchSecondLevelByParentID(int parentID) throws NetworkErrorException, NullPointerException {
         if(vrApi == null) {
             throw new NullPointerException();
         }
@@ -69,7 +69,7 @@ public class CoreModel implements MainContract.MainModel {
     }
 
     @Override
-    public ArrayList<ThirdLevelModel> getThirdLevelByParentID(int parentID) throws NetworkErrorException, NullPointerException {
+    public ArrayList<ThirdLevelModel> fetchThirdLevelByParentID(int parentID) throws NetworkErrorException, NullPointerException {
         if(vrApi == null) {
             throw new NullPointerException();
         }
@@ -88,7 +88,7 @@ public class CoreModel implements MainContract.MainModel {
     }
 
     @Override
-    public ArrayList<DetailModel> getDetailByID(int detailID) throws NetworkErrorException, NullPointerException {
+    public ArrayList<DetailModel> fetchDetailByID(int detailID) throws NetworkErrorException, NullPointerException {
         if(vrApi == null) {
             throw new NullPointerException();
         }
diff --git a/app/src/main/java/ru/volgorobot/vrcatalog/nodeViewBinders/FirstLevelNodeViewBinder.java b/app/src/main/java/ru/volgorobot/vrcatalog/nodeViewBinders/FirstLevelNodeViewBinder.java
index 72a2a32..78b6495 100644
--- a/app/src/main/java/ru/volgorobot/vrcatalog/nodeViewBinders/FirstLevelNodeViewBinder.java
+++ b/app/src/main/java/ru/volgorobot/vrcatalog/nodeViewBinders/FirstLevelNodeViewBinder.java
@@ -12,24 +12,23 @@ import me.texy.treeview.TreeNode;
 import me.texy.treeview.base.BaseNodeViewBinder;
 import ru.volgorobot.vrcatalog.MainContract;
 import ru.volgorobot.vrcatalog.R;
+import ru.volgorobot.vrcatalog.ViewBinderPresenter;
 import ru.volgorobot.vrcatalog.additional.NetworkErrorException;
 import ru.volgorobot.vrcatalog.additional.ResultWithErrorCode;
 import ru.volgorobot.vrcatalog.model.CoreModel;
 import ru.volgorobot.vrcatalog.model.FirstLevelModel;
 import ru.volgorobot.vrcatalog.model.SecondLevelModel;
 
-public class FirstLevelNodeViewBinder extends BaseNodeViewBinder {
+public class FirstLevelNodeViewBinder extends BaseNodeViewBinder implements MainContract.ViewBinder {
     TextView textView;
     ImageView imageView;
-    CoreModel coreModel;
-    MainContract.MainActivityView mView;
+    ViewBinderPresenter viewBinderPresenter;
 
-    public FirstLevelNodeViewBinder(View itemView, Context context, MainContract.MainActivityView mView, CoreModel coreModel) {
+    public FirstLevelNodeViewBinder(View itemView, Context context, MainContract.MainActivityView mView, MainContract.MainModel coreModel) {
         super(itemView);
         textView = (TextView) itemView.findViewById(R.id.node_name_view);
         imageView = (ImageView) itemView.findViewById(R.id.arrow_img);
-        this.coreModel = coreModel;
-        this.mView = mView;
+        viewBinderPresenter = new ViewBinderPresenter(mView, coreModel, this);
     }
 
     @Override
@@ -46,61 +45,14 @@ public class FirstLevelNodeViewBinder extends BaseNodeViewBinder {
     public void onNodeToggled(TreeNode treeNode, boolean expand) {
         if(expand) {
             FirstLevelModel firstLevelModel = (FirstLevelModel) treeNode.getValue();
-            new AsyncTask<Void, Void, ResultWithErrorCode<ArrayList<SecondLevelModel>>>() {
-                @Override
-                protected void onPreExecute() {
-                    super.onPreExecute();
-                    mView.swipeLayoutSetRefreshing(true);
-                }
-
-                @Override
-                protected ResultWithErrorCode<ArrayList<SecondLevelModel>> doInBackground(Void... voids) {
-                    ArrayList<SecondLevelModel> secondLevelModels = null;
-                    try {
-                        secondLevelModels = coreModel.getSecondLevelByParentID(firstLevelModel.getID());
-                    } catch (NetworkErrorException networkErrorException) {
-                        return new ResultWithErrorCode<>(secondLevelModels, networkErrorException.getErrorCode());
-                    } catch (NullPointerException nullPointerException) {
-                        return new ResultWithErrorCode<>(secondLevelModels, 3);
-                    }
-
-                    return new ResultWithErrorCode<>(secondLevelModels, 0);
-                }
-
-                @Override
-                protected void onPostExecute(ResultWithErrorCode<ArrayList<SecondLevelModel>> result) {
-                    super.onPostExecute(result);
-                    switch (result.getErrorCode()) {
-                        case 0: {
-                            ArrayList<TreeNode> treeNodes = new ArrayList<>();
-                            for (int i = 0; i < result.getData().size(); i++) {
-                                TreeNode treeNode1 = new TreeNode(result.getData().get(i));
-                                treeNode1.setLevel(1);
-                                treeNodes.add(treeNode1);
-                            }
-                            treeNode.setChildren(treeNodes);
-                            mView.refreshTree();
-                            imageView.animate().rotation(90).setDuration(200).start();
-                            break;
-                        }
-                        case 1: {
-                            mView.onFailureAnswer(1);
-                            break;
-                        }
-                        case 2: {
-                            mView.onFailureAnswer(2);
-                            break;
-                        }
-                        case 3: {
-                            mView.onFailureAnswer(3);
-                            break;
-                        }
-                    }
-                    mView.swipeLayoutSetRefreshing(false);
-                }
-            }.execute();
+            viewBinderPresenter.fetchSecondLevel(firstLevelModel, treeNode);
         } else {
             imageView.animate().rotation(0).setDuration(200).start();
         }
     }
+
+    @Override
+    public void rotateImageView() {
+        imageView.animate().rotation(90).setDuration(200).start();
+    }
 }
diff --git a/app/src/main/java/ru/volgorobot/vrcatalog/nodeViewBinders/SecondLevelNodeViewBinder.java b/app/src/main/java/ru/volgorobot/vrcatalog/nodeViewBinders/SecondLevelNodeViewBinder.java
index 1494cb2..fb561bb 100644
--- a/app/src/main/java/ru/volgorobot/vrcatalog/nodeViewBinders/SecondLevelNodeViewBinder.java
+++ b/app/src/main/java/ru/volgorobot/vrcatalog/nodeViewBinders/SecondLevelNodeViewBinder.java
@@ -12,25 +12,24 @@ import me.texy.treeview.TreeNode;
 import me.texy.treeview.base.BaseNodeViewBinder;
 import ru.volgorobot.vrcatalog.MainContract;
 import ru.volgorobot.vrcatalog.R;
+import ru.volgorobot.vrcatalog.ViewBinderPresenter;
 import ru.volgorobot.vrcatalog.additional.NetworkErrorException;
 import ru.volgorobot.vrcatalog.additional.ResultWithErrorCode;
 import ru.volgorobot.vrcatalog.model.CoreModel;
 import ru.volgorobot.vrcatalog.model.SecondLevelModel;
 import ru.volgorobot.vrcatalog.model.ThirdLevelModel;
 
-public class SecondLevelNodeViewBinder extends BaseNodeViewBinder {
+public class SecondLevelNodeViewBinder extends BaseNodeViewBinder implements MainContract.ViewBinder {
     TextView textView;
     ImageView imageView;
-    MainContract.MainModel coreModel;
-    MainContract.MainActivityView mView;
+    MainContract.ViewBinderPresenter viewBinderPresenter;
 
 
     public SecondLevelNodeViewBinder(View itemView, Context context, MainContract.MainActivityView mView, CoreModel coreModel) {
         super(itemView);
         textView = (TextView) itemView.findViewById(R.id.node_name_view);
         imageView = (ImageView) itemView.findViewById(R.id.arrow_img);
-        this.coreModel = coreModel;
-        this.mView = mView;
+        viewBinderPresenter = new ViewBinderPresenter(mView, coreModel, this);
     }
 
     @Override
@@ -48,60 +47,14 @@ public class SecondLevelNodeViewBinder extends BaseNodeViewBinder {
     public void onNodeToggled(TreeNode treeNode, boolean expand) {
         if(expand) {
             SecondLevelModel secondLevelModel = (SecondLevelModel) treeNode.getValue();
-            new AsyncTask<Void, Void, ResultWithErrorCode<ArrayList<ThirdLevelModel>>>() {
-                @Override
-                protected void onPreExecute() {
-                    super.onPreExecute();
-                    mView.swipeLayoutSetRefreshing(true);
-                }
-
-                @Override
-                protected ResultWithErrorCode<ArrayList<ThirdLevelModel>> doInBackground(Void... voids) {
-                    ArrayList<ThirdLevelModel> thirdLevelModels = null;
-                    try {
-                        thirdLevelModels = coreModel.getThirdLevelByParentID(secondLevelModel.getID());
-                    } catch (NetworkErrorException networkErrorException) {
-                        return new ResultWithErrorCode<>(thirdLevelModels, networkErrorException.getErrorCode());
-                    } catch (NullPointerException nullPointerException) {
-                        return new ResultWithErrorCode<>(thirdLevelModels, 3);
-                    }
-                    return new ResultWithErrorCode<>(thirdLevelModels, 0);
-                }
-
-                @Override
-                protected void onPostExecute(ResultWithErrorCode<ArrayList<ThirdLevelModel>> result) {
-                    super.onPostExecute(result);
-                    switch (result.getErrorCode()) {
-                        case 0: {
-                            ArrayList<TreeNode> treeNodes = new ArrayList<>();
-                            for (int i = 0; i < result.getData().size(); i++) {
-                                TreeNode treeNode1 = new TreeNode(result.getData().get(i));
-                                treeNode1.setLevel(2);
-                                treeNodes.add(treeNode1);
-                            }
-                            treeNode.setChildren(treeNodes);
-                            mView.refreshTree();
-                            imageView.animate().rotation(90).setDuration(200).start();
-                            break;
-                        }
-                        case 1: {
-                            mView.onFailureAnswer(1);
-                            break;
-                        }
-                        case 2: {
-                            mView.onFailureAnswer(2);
-                            break;
-                        }
-                        case 3: {
-                            mView.onFailureAnswer(3);
-                            break;
-                        }
-                    }
-                    mView.swipeLayoutSetRefreshing(false);
-                }
-            }.execute();
+            viewBinderPresenter.fetchThirdLevel(secondLevelModel, treeNode);
         } else {
             imageView.animate().rotation(0).setDuration(200).start();
         }
     }
+
+    @Override
+    public void rotateImageView() {
+        imageView.animate().rotation(90).setDuration(200).start();
+    }
 }
diff --git a/app/src/main/java/ru/volgorobot/vrcatalog/nodeViewBinders/ThirdLevelNodeViewBinder.java b/app/src/main/java/ru/volgorobot/vrcatalog/nodeViewBinders/ThirdLevelNodeViewBinder.java
index c3365b9..1545d46 100644
--- a/app/src/main/java/ru/volgorobot/vrcatalog/nodeViewBinders/ThirdLevelNodeViewBinder.java
+++ b/app/src/main/java/ru/volgorobot/vrcatalog/nodeViewBinders/ThirdLevelNodeViewBinder.java
@@ -12,6 +12,7 @@ import me.texy.treeview.TreeNode;
 import me.texy.treeview.base.BaseNodeViewBinder;
 import ru.volgorobot.vrcatalog.MainContract;
 import ru.volgorobot.vrcatalog.R;
+import ru.volgorobot.vrcatalog.ViewBinderPresenter;
 import ru.volgorobot.vrcatalog.additional.NetworkErrorException;
 import ru.volgorobot.vrcatalog.additional.ResultWithErrorCode;
 import ru.volgorobot.vrcatalog.model.CoreModel;
@@ -19,17 +20,13 @@ import ru.volgorobot.vrcatalog.model.DetailModel;
 import ru.volgorobot.vrcatalog.model.ThirdLevelModel;
 import ru.volgorobot.vrcatalog.view.DetailActivity;
 
-public class ThirdLevelNodeViewBinder extends BaseNodeViewBinder {
+public class ThirdLevelNodeViewBinder extends BaseNodeViewBinder implements MainContract.ViewBinder {
     TextView textView;
-    Context context;
-    MainContract.MainModel coreModel;
-    MainContract.MainActivityView mView;
+    MainContract.ViewBinderPresenter viewBinderPresenter;
 
     public ThirdLevelNodeViewBinder(View itemView, Context context, MainContract.MainActivityView mView, CoreModel coreModel) {
         super(itemView);
-        this.context = context;
-        this.coreModel = coreModel;
-        this.mView = mView;
+        viewBinderPresenter = new ViewBinderPresenter(mView, coreModel, this, context);
         textView = (TextView) itemView.findViewById(R.id.node_name_view);
     }
 
@@ -46,57 +43,12 @@ public class ThirdLevelNodeViewBinder extends BaseNodeViewBinder {
     @Override
     public void onNodeToggled(TreeNode treeNode, boolean expand) {
         super.onNodeToggled(treeNode, expand);
-        new AsyncTask<Void, Void, ResultWithErrorCode<DetailModel>>() {
-            @Override
-            protected void onPreExecute() {
-                super.onPreExecute();
-                mView.swipeLayoutSetRefreshing(true);
-            }
+        ThirdLevelModel thirdLevelModel = (ThirdLevelModel) treeNode.getValue();
+        viewBinderPresenter.fetchDetail(thirdLevelModel);
+    }
 
-            @Override
-            protected ResultWithErrorCode<DetailModel> doInBackground(Void... voids) {
-                ArrayList<DetailModel> detail = null;
-                try {
-                    detail = coreModel.getDetailByID(((ThirdLevelModel)treeNode.getValue()).getID());
-                } catch (NetworkErrorException networkErrorException) {
-                    return new ResultWithErrorCode<>(detail.get(0), networkErrorException.getErrorCode());
-                } catch (NullPointerException nullPointerException) {
-                    return new ResultWithErrorCode<>(detail.get(0), 3);
-                }
-                return new ResultWithErrorCode<>(detail.get(0), 0);
-            }
-
-            @Override
-            protected void onPostExecute(ResultWithErrorCode<DetailModel> result) {
-                super.onPostExecute(result);
-                switch (result.getErrorCode()) {
-                    case 0: {
-                        Intent intent = new Intent(context, DetailActivity.class);
-                        intent.putExtra("detailName", result.getData().getName());
-                        intent.putExtra("detailQuantity", result.getData().getNumber().toString());
-                        intent.putExtra("detailPrice", result.getData().getPrice());
-                        intent.putExtra("detailContry", result.getData().getCountry());
-                        intent.putExtra("detailAnalogue", result.getData().getAnalogue());
-                        intent.putExtra("detailDatasheet", result.getData().getDocURL());
-                        intent.putExtra("detailNotes", result.getData().getNotes());
-                        mView.startActivityByIntent(intent);
-                        break;
-                    }
-                    case 1: {
-                        mView.onFailureAnswer(1);
-                        break;
-                    }
-                    case 2: {
-                        mView.onFailureAnswer(2);
-                        break;
-                    }
-                    case 3: {
-                        mView.onFailureAnswer(3);
-                        break;
-                    }
-                }
-                mView.swipeLayoutSetRefreshing(false);
-            }
-        }.execute();
+    @Override
+    public void rotateImageView() {
+        // This is unnecessary.
     }
 }