AKG WMS 420 Presenter Set Band 1, UHF Wireless-System, True Diversity, up to 8 frequencies parallel, 10 mW transmitted power, Low-Battery-LED on transmitter, 9,5" receiver, removeable BNC-antennas, pocket transmtter with C417L lapel microphone, condenser, omni-directional, 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 1 748,100 - 751,900 MHz