1. Wireless V4.2 BES2000IS
2. Support protocols: Headset Hands-free A2DP Avrcp
3. Digital active noise reduction, noise reduction depth ≥25dB
4. Speaker: 12mm; Battery capacity: 180mAh;
5. Size: total length of headphones is 86cm; product net weight: 30g
6. Charging voltage DC5V; charging time: 2.5 hrs
7. Call/music time: 8 hours; standby time 300 hours
8. With ANC noise reduction button switch
9. Battery display <Support for Apple phones and some Android phones>