diff --git a/README.md b/README.md
index 63ea34c..1689432 100644
--- a/README.md
+++ b/README.md
@@ -27,25 +27,6 @@ Next, import 'flutter_reaction_button.dart' into your dart code.
 import 'package:flutter_reaction_button/flutter_reaction_button.dart';
 ```
 
-## Parameters
-| parameter                  | description                                                                           | default                                                                                                                                                                               |
-| -------------------------- | ------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
-| OnReactionChanged          | triggered when reaction button value change                                           ||
-| reactions                  | reactions appear in reactions box when long pressed on ReactionnButtonToggle or click on ReactionButton ||
-| initialReaction            | Default reaction button widget                                                        | first item in reactions list |
-| boxPosition                | Vertical position of reactions box relative to the button                             | VerticalPosition.TOP |
-| boxHorizontalPosition      | Horizontal position of reactions box relative to the button                           | HorizontalPosition.START |
-| boxOffset                  | Offset to reposition the box from the computed place                                  | Offset.zero |
-| boxColor                   | Reactions box color                                                                   | Colors.white |
-| boxElevation               | Reactions box elevation                                                               | 5 |
-| boxRadius                  | Reactions box radius                                                                  | 50 |
-| boxPadding                 | Reactions box padding                                                                 | const EdgeInsets.all(0) |
-| boxDuration                | Reactions box show/hide duration                                                      | 200 milliseconds |
-| shouldChangeReaction       | Should change initial reaction after selected one or not                               | true |
-| itemScale                  | Scale ratio when item hovered                                                         | 0.3 |
-| itemScaleDuration          | Scale duration while dragging                                                         | const Duration(milliseconds: 100) |
-
-
 ## LICENSE
 
 ```legal
diff --git a/example/README.md b/example/README.md
index d2eb2a9..30e8a55 100644
--- a/example/README.md
+++ b/example/README.md
@@ -1,21 +1,19 @@
 # flutter_reaction_button_example
 
-ReactionButtonToggle:
+ReactionButton:
 
 ```dart
-ReactionButtonToggle<String>(
-    onReactionChanged: (String? value, bool isChecked) {
-        debugPrint('Selected value: $value, isChecked: $isChecked');
+ReactionButton<String>(
+    onReactionChanged: (Reaction<String>? reaction) {
+        debugPrint('Selected value: ${reaction?.value}');
     },
     reactions: <Reaction<String>>[
         Reaction<String>(
             value: 'like',
-            previewIcon: widget,
             icon: widget,
         ),
         Reaction<String>(
             value: 'love',
-            previewIcon: widget,
             icon: widget,
         ),
         ...
@@ -35,28 +33,25 @@ ReactionButtonToggle<String>(
 ReactionButton:
 
 ```dart
-ReactionButton<String(
-    onReactionChanged: (String? value) {
-        debugPrint('Selected value: $value');
+ReactionButton<String>(
+    toggle: false,
+    onReactionChanged: (Reaction<String>? reaction) {
+        debugPrint('Selected language: ${reaction?.value}');
     },
     reactions: <Reaction<String>>[
         Reaction<String>(
             value: 'en',
-            previewIcon: widget,
             icon: widget,
         ),
         Reaction<String>(
             value: 'ar',
-            previewIcon: widget,
             icon: widget,
         ),
         ...
     ],
     initialReaction: Reaction<String>(
         value: null,
-        icon: Icon(
-            Icons.language,
-        ),
+        icon: Icon(Icons.language),
     ),
 )
 ```
\ No newline at end of file
diff --git a/example/lib/image.dart b/example/lib/image.dart
index 0febd50..8665b99 100644
--- a/example/lib/image.dart
+++ b/example/lib/image.dart
@@ -16,7 +16,7 @@ class ImageWidget extends StatefulWidget {
 }
 
 class _ImageWidgetState extends State<ImageWidget> {
-  String? _selectedReaction;
+  Reaction<String>? _selectedReaction;
 
   @override
   Widget build(BuildContext context) {
@@ -39,7 +39,7 @@ class _ImageWidgetState extends State<ImageWidget> {
                 ),
               ),
               child: ReactionButton<String>(
-                onReactionChanged: (String? value) {
+                onReactionChanged: (Reaction<String>? value) {
                   setState(() {
                     _selectedReaction = value;
                   });
diff --git a/example/lib/main.dart b/example/lib/main.dart
index 7f49616..f079d9b 100644
--- a/example/lib/main.dart
+++ b/example/lib/main.dart
@@ -31,10 +31,11 @@ class MyApp extends StatelessWidget {
                   dimension: 30,
                   child: ReactionButton<String>(
                     toggle: false,
-                    onReactionChanged: (String? value) {
+                    onReactionChanged: (Reaction<String>? reaction) {
                       ScaffoldMessenger.of(context).showSnackBar(
                         SnackBar(
-                          content: Text('Selected language: $value'),
+                          content:
+                              Text('Selected language: ${reaction?.value}'),
                         ),
                       );
                     },
diff --git a/example/lib/post.dart b/example/lib/post.dart
index 0132ee3..63ad8f7 100644
--- a/example/lib/post.dart
+++ b/example/lib/post.dart
@@ -41,8 +41,8 @@ class PostWidget extends StatelessWidget {
                 children: [
                   ReactionButton<String>(
                     itemSize: const Size.square(40),
-                    onReactionChanged: (String? value) {
-                      debugPrint('Selected value: $value');
+                    onReactionChanged: (Reaction<String>? reaction) {
+                      debugPrint('Selected value: ${reaction?.value}');
                     },
                     reactions: reactions,
                     placeholder: data.defaultInitialReaction,
diff --git a/lib/src/widgets/reaction_button.dart b/lib/src/widgets/reaction_button.dart
index 6e42fcf..15d2401 100644
--- a/lib/src/widgets/reaction_button.dart
+++ b/lib/src/widgets/reaction_button.dart
@@ -26,11 +26,12 @@ class ReactionButton<T> extends StatefulWidget {
     this.boxPadding = const EdgeInsets.all(4),
     this.boxAnimationDuration = const Duration(milliseconds: 200),
     this.itemAnimationDuration = const Duration(milliseconds: 100),
+    this.hoverDuration = const Duration(milliseconds: 400),
     this.child,
   }) : _type = child != null ? ReactionType.container : ReactionType.button;
 
   /// This triggers when reaction button value changed.
-  final ValueChanged<T?> onReactionChanged;
+  final ValueChanged<Reaction<T>?> onReactionChanged;
 
   /// Default widget when [isChecked == false]
   final Reaction<T>? placeholder;
@@ -79,6 +80,8 @@ class ReactionButton<T> extends StatefulWidget {
 
   final Widget? child;
 
+  final Duration hoverDuration;
+
   final ReactionType _type;
 
   @override
@@ -99,10 +102,18 @@ class _ReactionButtonState<T> extends State<ReactionButton<T>> {
 
   bool get _isContainer => widget._type == ReactionType.container;
 
+  void _updateReaction(Reaction<T>? reaction) {
+    _isChecked = reaction != widget.placeholder;
+    widget.onReactionChanged.call(reaction);
+    setState(() {
+      _selectedReaction = reaction;
+    });
+  }
+
   void _onHover(Offset offset) {
     _hoverTimer?.cancel();
     _hoverTimer = Timer(
-      const Duration(milliseconds: 400),
+      widget.hoverDuration,
       () {
         _onShowReactionsBox(offset);
       },
@@ -151,14 +162,6 @@ class _ReactionButtonState<T> extends State<ReactionButton<T>> {
     Overlay.of(context).insert(_overlayEntry!);
   }
 
-  void _updateReaction(Reaction<T>? reaction) {
-    _isChecked = reaction != widget.placeholder;
-    widget.onReactionChanged.call(reaction?.value);
-    setState(() {
-      _selectedReaction = reaction;
-    });
-  }
-
   void _disposeOverlayEntry() {
     _overlayEntry
       ?..remove()