Fangrui Product Details 1. Yanmai Gf525 2 In 1 Broadcast 2.4g Wireless Lavalier Microphone Mini Clip-on Mic With Led Display 2. Features: 3. Microphone Volume Adjustment, One-key Noise Reduction Function, With Led Display 4. Self-connection After Booting, Frequency Is Stable 5. 30 Meters Barrier-free And Stable Transmission 6. 10 Hours Of Battery Life, 1 Hour Of Charging 7. Built-in Microphone, Real-time Monitoring, Clear Sound, No Lag, Constant Frequency 8. Support Slr, Mobile Phone, Audio And Other Equipment Connection 9. Support One-to-one And One-to-two Modes Of Use, No Serial Frequency, Flexible Collocation, Easy To Deal With Various Scenarios 10. Multi-purpose, Multi-compatible, Making Short Video Creation, Vlog Shooting, Live Sound Pickup, Program Interviews, Online Class Teaching, Etc. Have Good Sound Quality 11. Parameter: 12. Pointing Type: Omnidirectional 13. Working Frequency Band: 2.4ghz (private Protocol) 14. Frequency Response Range: 20hz~20khz 15. Transmission Distance: About 30 Meters 16. Transmit Power: Less Than 10dbm 17. Battery Capacity: 3.7v350mah 18. Charging Port: Type-c 19. Rated Input Of Charging Interface: Dc 5v500ma 20. Charging Time: About 1 Hour 21. Battery Life: 10 Hours 22. Working Temperature: -10~45 Degrees Celsius 23. Storage Temperature: -20~60 Degrees Celsius