Anivia A8 Bluetooth Telephone Headset with Noise-cancelling Microphone(Black)

1. Receiving distance: 8-15 meters 2. Microphone type: single-point silicon microphone 3. Microphone sensitivity: 34db+/-3db 4. Battery capacity: 250mah 3.7V 5. Continuous working time: about 20 hours 6. Charging time: 2 hours 7. Static standby time: about 200 hours 8. Speaker impedance: 32 ohms 9. Speaker diameter: 30mm 10. Speaker sensitivity: 111+/-3db 11. Speaker output power: 15mw-30mw 12. Frequency response: 20hz-20khz 13. The earmuffs are soft and comfortable, and comfortable to wear 14. The microphone can be rotated by 330 degrees 15. Multiple noise reduction, clear call 16. Multi-function buttons, easy to operate 17. Point-touch charging base, easy to use, charging interface is Type-C