Get rid of cord constraints, automatically pair and plug and play. Plug in the receiver to automatically connect when turned on 360° pick-up without dead angle. High-density anti-spray sponge, high-sensitivity microphone, 360 ° no dead angle radio, fast response, delicate sound quality, reduce the interference of the surrounding environment, record every detail of the sound 20 meters barrier-free connection, more free recording. High-performance wireless microphone, stable signal, more than 20 meters barrier-free distance, unlimited free recording Intelligent noise reduction, built-in decoding chip. Built-in noise reduction chip, strong anti-interference ability, can effectively identify the original sound, and can still record clearly in a noisy environment Built-in long battery life, long-term use without electricity. Built-in 60mAh battery, ultra-long battery life of 5 hours, short video recording, unfettered on-site recording, easy to deal with in various noisy environments, worry-free shooting, to meet your day's needs Compatible with multiple devices. Support mobile phones, cameras, notebooks, etc., devices with a microphone interface can be easily connected and used Specifications: Size: 57 x 15 x 8mm Weight: 10.5g Frequency: 2.4GHz Transmission distance: 20M-30M Power supply: 60mAh Li-ion battery (2Pcs Mic Transmitter Total: 120mAh) Frequency response rate: 20Hz-20KHz Charging time: up to 1 hour Working hours: up to 6 hours Sensitivity: -42dB