The Line 6 TBP12 Transimitter is the 12-channel beltpack transmitter for use with Line 6 Relay RX212 digital wireless receivers, and G50 or G90 Wireless Guitar Systems. The easy-to-read LCD screen displays up-to-the-minute battery life data and the active channel number. Bright LEDs offer vital battery life and audio signal data. Line 6 TBP12 has mute and channel select buttons for control, and features rugged metal construction. Protective zipper case is included.