SX21 Type-C Port 2.4G Smart Clip-On Wireless Microphone 1. Adopt small size and round design, mini and light, flexible and convenient installation 2. Powerful magnetic clip adsorption, can be quickly clamped on the collar of clothes, stable and not easy to fall off 3. Use a 360-degree omnidirectional condenser microphone to provide pure and ultra-clear sound pickup for professional-level recording and presentations 4. Adopting ENC environmental noise reduction design, while retaining the original sound texture, it can accurately reduce noise at different frequencies, effectively reduce external interference and eliminate environmental noise. 5. Plug and play, no need to install drivers, easy to use 6. Can be used for webcasting, video Vlog shooting, program interviews, interview recordings, video teaching, etc. Specifications: 1. Microphone: digital microphone 2. Input voltage: 5V 3. Microphone battery: 110mAh (2 pcs is 220mAh) 4. Charging compartment battery: 800mAh 5. Battery life: 9 hours 6. Signal-to-noise ratio: 64DBM 7. Transmission delay: 30MS 8. Sensitivity: -42 dB 9. Frequency response range: 20-20KHZ 10. Transmission distance: 20-30m (barrier-free)