This simple plug and play device will allow you to use Wii compatible Nunchuks with the XAC or PC. The two buttons are preprogrammed to be X1 and X2 for the right side of the XAC, Menu and View for the left side of the XAC. (Use the XAC config menu to remap them as needed). You can get a compatible Nunchuck from Amazon or any other place for around $10 or a Nunchuk from us bundled with the adapter. This device comes with a 3 foot USB cable.