Instructions
Turn your wireless Xbox 360 guitar "On." Because the wireless guitar uses regular alkaline batteries, you have the ability to turn it completely off in order to save battery capacity. Your guitar controller will not sync to the console when in the "Off" power status. Turn on your controller and attempt to sync it again.
Press both "Sync" buttons. Just like a regular wireless XBox 360 gaming controller, you must press the sync button on the front of your Xbox 360 and the sync button on the controller itself in order to connect one device to the other.
Do not attempt to connect more than two guitar-shaped controllers. All versions of "Guitar Hero" and "Rock Band" (the two games that support guitar-shaped controllers) will not register more than two guitars at any given time. This is because each song for both games only has two guitar parts--lead guitar and bass guitar. The other two parts of the four-player game are lead vocals and drums.