awei AT6 Wireless Bluetooth V5.4 Hi-Fi Stereo Headphones

1. Bluetooth version: V5.4 AC7026A2
2. Bluetooth protocol: a2dp 1.3.2avctp 1.4avdtp 1.3avrcp 1.6.2hfp 1.8spp 1.2rfcomm 1.1pnp 1.3hid 1.1.1sdp core5.3l2cap core 5.3
3. Channel system: stereo
4. Battery capacity: 300mAH
5. Charging time: 2.5h
6. Music time: about 25H
7. Talk time: about 24H
8. Speaker specifications: 40mm
9. Speaker sensitivity: 113+-3db
10. Optimal talk distance about 1M
11. Maximum transmission distance 10M
12. Bluetooth operating frequency: 2.402GHz-2.480GHz
13. Charging interface: TYPE-C