Wireless Nunchuk for Wii. Compatible with all games requiring a nunchuk. Simply snap the wireless receiver to the bottom of your Wii Remote, press the synch button on your wireless nunchuk and you are ready for non-stop, wireless gaming. An integrated LED status indicator on the receiver lets you know when you are connected, synched and ready to game. No need to buy batteries. Built-in rechargeable Lithium Ion battery an dUSB cable included. 4-player compatible.