Line 6 Relay G10 Digital Wireless Guitar System 2.4 GHz Digital Guitar Wireless System with Rechargeable Transmitter Automatic channel setup-just plug in and play Recharge the transmitter by docking it on the receiver Up to 8 hours playing time and 200 hours sleep time per charge - 50-foot range indoors &quot;No-pop&quot; audio mute - only passes audio when the transmitter is fully plugged in