Adopting mini size and round shape design, it eliminates the bulkiness and is flexible and convenient to install The powerful magnetic clip adsorption ensures that the microphone can be quickly and safely clipped to the collar of clothing, making it stable and not easy to fall off Adopts 360° omnidirectional condenser microphone to provide pure, ultra-clear sound pickup for professional-level recording and presentations With ENC environmental noise reduction design, it can accurately reduce noise at different frequencies while retaining the original sound texture, effectively reducing external interference and eliminating environmental noise Plug and play, no APP required It can be used for online live broadcast, video Vlog shooting, program interviews, interview recordings, and video teaching Specification: Microphone: digital microphone Input voltage: 5V Microphone battery: 110mAh (2pcs are 220mAh) Charging bin battery: 800mAh Battery life: 9 hours Signal-to-noise ratio: 64DBM Transmission delay: 30MS Sensitivity: -42DB Frequency response range: 20-20KHZ Transmission distance: 20 meters-30 meters (barrier-free)