the t.bone TWS 16 GT 821 MHz - 16-channel UHF wireless system, 9.5" diversity receiver, GT plug-on guitar transmitter, 16 switchable frequencies ( 821.725 MHz - 831.450 MHz ), up to 2 parallel systems, switchable squelch, XLR & jack output, external power supply (DC 12V/500mW), DC out for recharging transmitter. Accessories included: 19" rackmounts (for 2x TWS16), 1m XLR-jack output cable, DC recharging cable, transmitter requires 1.5V AAA batteries. Please note: Due to every country having different regulations, you may need to contact your local licensing authorities before using a wireless system.