Lavalier Mic Wireless Kit (Long)PM-31u

Battery capacity 300MAh Working voltage 2.0V Battery life about 5 hours Microphone φ6.0 2.2mm capacitive omnidirectional Sensitivity -32dB±1dB Frequency response 100Hz-16KHz Impedance ≤2.2kΩ Signal to noise ratio greater than 60dB Standard plug 3.5mm Working distance 30 me Working distance 30 meters