Fangrui Product Details 1. Wireless Lavalier Microphone One To One Live Recording Noise Canceling Mics 2. Realize Long-distance High-definition Radio For Live Webcasting, Video Vlog Shooting, Interview Radio, Video Teaching And Other Occasions Use 3. Automatic Noise Reduction, Reverb, Monitoring, Playback, Mute, Can Be Live While Charging The Phone 4. 2.4g Wireless Coupling, Boot Automatically Connected, Simple Operation 5. Can Be Used For Cell Phones, Computers, And Other Devices Without App 6. Built-in Optimized Antenna Design, Signal Stability, Real-time Monitoring 7. Full Finger Ring Pickup, Strong Anti-interference Ability, Can Effectively Identify The Original Sound, To Meet The Needs Of Noisy Environment Recording 8. Dsp Intelligent Noise Reduction Chip, Filter Excess Noise, Restore The Human Voice 9. Parameters: 10. Microphone: Digital Silicon Mark 11. Input Voltage: 5v 12. Microphone Battery: 300mah 13. Receiver Battery: 300mah 14. Continuity: 6 Hours 15. Signal-to-noise Ratio: 64dbm 16. Transmission Delay: 30ms 17. Sensitivity: -42db 18. Frequency Range: 20hz-20khz 19. Transmission Distance: 20m-30m Without Obstacles 20. Size (with Color Box): 12.1 X 8.1 X 3.1cm 21. Weight: About 25g