UHF-9 Headset LED Wireless Noise Cancelling Earphone (Black)

1. Plug diameter: 3.5mm
2. Wire length: 3 m
3. Horn diameter: 40 mm
4. Sensitivity: 10dB
5. Frequency response range: 20-20000Hz
6. Distortion rate: less than 1%
7. Impedance: 32
8. Signal to noise ratio75dB
9. Frequency Response: 30 - 20,000Hz
10. Headphone power supply: built-in 600MaH rechargeable lithium battery
11. The headset must be connected to the transmitter for use
12. Application of active noise reduction technology. The signal-to-noise ratio is above 70DB and the separation is 50DB, almost no noise is felt, which is close to the level of wired headphones.
13. By playing up to 3 different audios.
14. No audio source automatic shutdown design. When there is no sound source, the headset will automatically turn off after 5 minutes, avoiding stray interference.