... ,transmitter distance: >80M 3,730~950MHz 4, Passed ISO, UHF wireless microphone series Frequency range730~950MHzShaking modeLocking and frequency within for ... 2PCS( 2*1.5V AA Size). We are manufacturer, professional microphones.1, 1 master, 2MIc.2, Transmitter distance: >80M3, 730~950MHz ...