Wireless Microphone Set Receiving Frequency : 488 MHz - 506 MHz S/N Ration : 102 dB or more Harmonic Distortion : 1 % or less Finish : ABS Resin Black Paint Power Source : AC Adapter 100 - 240 V AC 50/60 Hz | DC 12 - 15 V Indicator : RF - AF (CH-A) | RF - AF (CH-B) | LCD Display Fixed Antenna Power Consumption : 200 mA (13.5 V DC when operating two tuner modules)