Yanmai Em1 2.4g Wireless Headset Microphone

Features: 1. Self-connection after power-on, stable frequency 2. 30 meters barrier-free and stable transmission 3. Support volume and volume adjustment, support one-key noise reduction function 4. The sound is clear, not stuck, and constantly frequency 5. Applicable scenarios: video, on-site teaching 6. No serial frequency, flexible collocation, easy to deal with various scenes, the same scene can use 6 groups at the same time parameter: 1. Pointing range: omnidirectional 2. Frequency: 2.4G 3. Frequency response range: 20Hz-20kHz 4. Transmission distance: 50 meters 5. Signal-to-noise ratio: greater than or equal to 58db 6. Battery capacity: 350mAh/3.7v 7. Charging interface: Type-c interface 8. Rated input: DC5V/1000mAh 9. Charging time: 30 minutes 10. Working hours: 6-8 hours 11. Working temperature: -10-45 degrees Celsius 12. Storage temperature: -20-60 degrees Celsius