AKG WMS 420 Instrument Set Band D, UHF Wireless-System, True Diversity, up to 3 frequencies parallel, 10 mW transmitted power, Low-Battery-LED on transmitter, 9,5" receiver, removeable BNC-antennas, pocket transmtter with guitar cable, 3 pin TQG connector, silent On-Mute-Off-switch, charging contacts for optional CU 400, works with 1x 1,5 Volt AA battery, Outputs: XLR (bal.) and jack (unbal.), frequency band D 863,100 - 864,900 MHz