TEMEISHENG W-104 wireless mic

Frequency range:	A:650MHz~664.MHz B:666MHz-680.7MHz
Transmitter power supply:	1 x 1.5V (A) batteries
Frequency response:	30Hz-20KHz
Comprehensive signal-to-noise ratio:	≥95dB
Comprehensive Distortion:	≤0.01%
Reciver Sensitivity:	-90dbm
Reciver Distortion:	<0.5% @1KHz
Wireless microphone S/N:	>95dB
Wireless microphone dynamic range:	>90dB