... 1,1 Master and 2 mic 2,transmitter distance: >80M 3,730~950MHz 4, Passed ISO, UHF wireless microphone series Frequency range730~ ... ( Peak 30mW).Turning modechanged frequencyBattery No 5 battery 2PCS( 2*1.5V AA Size). We are manufacturer, professional microphones. ... 1, 1 master, 2MIc.2, Transmitter distance: >80M3, 730~950MHz.4, Has been passed ...