•Built-in long-lasting battery life,long-term use of uninterrupted power,built-in 80mAh battery,long-lasting life of 10 hours,short video recording,live recording,unrestrained,easy to deal with various noisy environments •20 meters barrier-free connection,recording more freedom,high-performance wireless microphone,stable signal,a barrier-free distance of more than 20 meters,free recording is not limited •Intelligent noise reduction,built-in decoding chip,built-in noise reduction chip,strong anti-interference ability,effectively identify the original sound,and can still record clearly in a noisy environment Specification: •Frequency range: 2.4GHz •Transmitter working current: 11~12mA •Boot current: 10~11mA •Working current of receiving end: 20~21mA •Power-on current at the receiving end: 8~9mA •Shutdown current: 2~3uA •Working temperature: -10~45mA •Charging input voltage: DC4.8~5.4v •Working time: about 6H •Charging port: TYPE-C •Charging time: about 90min •Charging current: about 60mA •Battery capacity: battery 80mAh •Full battery voltage: 4.1~4.25V •Transmission distance: 20 meters barrier-free distance •Human obstacle distance: 7 meters •Left and right signal-to-noise ratio: 64 dBm •Transmission delay: 30MS •Sensitivity (microphone): -42dB •Microphone head: Silicone •Antenna type: ceramic antenna •Frequency response range: 20-20KHZ Package included: •1 x Microphone •1 x Receiver •1 x Data Cable •1 x English and Chinese User Manual •Other items not included