Great wii accessory!! This Wii Rechargeable Grip has nice appearance and good touching-feeling. Built-in 1800mAh rechargeable battery which is powered by USB cable. Designed according to controller shape, anti-slip that you ca play your games freely by holding the grip. 
         
Description
 

Brand new Wii Rechargeable Grip
Great Wii Remote Grip for very easy to use
Simply push your wii-mote into the slot
Remote Control Grip comes with USB cable (as shown) for charging.
White Wii Grip wii includes 1800 mAh battery (built in)
Gives you an extra 6 hrs of game play!
Comfortable & Easier to pay games
Convert your controller into a classic controller easily
 White
Sturdy & Durable Plastic
This is a must have for all Wii Gamers!
This is a non-OEM generic product
Size: ~19.5 x 9 x 4.6cm