Stylish crystal material prevents any scratching. Anti-dust, easy set-up and comfortable, suitable for long time operation and protect your wii remote. Assemble button to Wii remote controller. Gives analog stick feel of playing on the D-Pad. Directly operate Wii remote controller 3D button and "A" button to get the purpose of operating Wii remote contoller "+" button and "A" button. Comes with 6 different exchangable buttons for better play options. If you want to change to another button, please take out the original one and fix a new one, there are 6 exchangeable buttons at choice.