Edifier W820NB Bluetooth Wireless Noise Cancelling Sports Music Headset(Grey)

1. Clear calls, long battery life, hybrid active noise reduction
2. Lightweight design, comfortable to wear, long-term wear without fatigue
3. Function: call function, voice control
4. Channel: Stereo
5. Frequency response range: 20-40000Hz
6. Rated power: 5w
7. Rated voltage: 5v
8. Rated current: 1A
9. Audio decoding: AAC, SBC
10. Bluetooth protocol: A2DP, AVRCP, HFP
11. How to use: head-mounted
12. Working hours: Noise reduction on for 29 hours, noise reduction off for 49 hours
13. Charging time: about 1.5 hours
14. Transmission range: 10 meters
15. Battery capacity: 400mah
16. Power mode: USB charging / built-in lithium battery
17. Weight: 220g