Wii twin remote docking station, Charges from your Wii console or any personal computer via USB port by supplied USB charging cable.Plug the small head of the USB cable to the socket on dock charge. Plug the USB cable into a spare USB socket on your console. Turn on your console. Insert 2*AAA size NI-Mh rechargeable batteries into the supplied remote charge covers,observing the charging docks.

Including:

1*Doching station

1*USB cable

2*Battery cover

1*NDSL adapter

4*rechargeable battery

http://www.ishopvideogame.com/twin-remote-docking-station-for-wii-p-1116.html