S3 nature sound anc noise reduction wireless headphones 400mah for 200h standby and 20h of music / calls
1. Wireless v4.2 csr64215.
2. Support protocols: headset, hands-free, a2dp, avrcp.
3. Anc function, using ams (as3415) noise reduction chip, noise reduction depth ≥ 25db.
4. Speaker: 40mm, sensitivity: 114db ± 3db.
5. Battery capacity: 400mah. Size: 210*115*83mm. Weight: 270g.
6. Charging voltage dc5v, charging time: 2.5hrs.
7. Call / music time: 20hrs (anc on: 10hrs). Standby time: 200hrs.
8. With anc button switch, supports wired aux input.
9. Battery display supported for apple phones and some android phones