Transmission Frequency:2.4G Wireless Microphone
Microphone Type:Uni-Directional(Cardioid) Condenser microphone
Transmitting and Receiving Distance:>30 meters
Frequency Response:20-20KHz
Power Supply:Polymer lithium-ion battery-(400mAh) 3.7V
Usage Time:About 6 hours
Wireless Range:131feet 40M(in the wide place)
Charging Mode:Dual USB charging
Charging Time:2.5 hours