Built-in Battery Capacity (TX & RX) 400mAh/3.7V

Buy at www.musicianscart.com NUX B-10 Vlog Camera Wireless Microphone System for Vlog Shooting Live broadcasts,Storage Case,Easy to use,Stable Wireless Connection,Operating Frequency Band 2.4 GHz,Operation Length < 100 feet (30m),Sampling Rate 24bit / 44.1 kHz,Frequency Response 50Hz-20kHz,Latency < 5ms,Dynamic Range 96dB,THD+ Noise <0.2%@1 kHz,Built-in Battery Capacity (TX & RX) 400mAh/3.7V,Maximum Input Level(3.5mm TRS) 100mVrms(-20dBV),Battery Running Time 4 hours for TX，6 hours for RX,Microphone on TX Omnidirectional Electret Condenser Microphone,Maximum Sound Pressure Level 110dB SPL