... via Bluetooth technology3)Fashionable design with crystal buttons in front of control4)Buttons: direction key, A B, (minus),(plus),1 ... home.5)Expanding connectable slot on the buttom of control6)Include functions of pointing, motion sensor,speaking and shocking feedback..7 ... line ect,therefore,we can effectively control our cost,as we control the core part of the products! For the best service ...