★External infrared signal receiver and internal power amplifier unit. Infrared transmission does not crossover or penetrate the wall, thus with strong anti-interference. Independent control for microphone volume, reverberation  function. Distinct amplification with stable performance.
★Unique 3-stage anti-howling function design which can effectively suppress the sound feedback and howling.
★3 audio signal inputs, 2 audio signal outputs, 3 wired micophone inputs, 1 infrared wireless signal input,four speaker connectors.
★3 audio inputs, 1 audio output, 4 wired microphone inputs, 1 infrared wireless mic frequency input.
★Infrared receving radius: ≥10M
★Infrared wave length: 850nm
★Receving frequency: 2.0MHz-6.5MHz
★Sensitivity: ≥85dB
★Output power：2×50W
★Power supply：AC220V/50Hz