... transmitter distance: >80M 3,730~950MHz 4, Passed ISO, UHF wireless microphone series Frequency range730~950MHzShaking modeLocking and frequency within for ... frequency Sensitivity-90dBmFrequency response40Hz~18KHzT.H.D≤0.5%S/n ratio≥100dBAudio outputBlanced and unblancedTransmitter power10mW( Peak 30mW).Turning ... , Has been passed ISO, CE, CCC,Certificate etc... UHF wireless microphone series