awei A300BL Wireless Stereo Headphones, A300BL

1. Bluetooth version: 5.0
2. Battery capacity: 400mAh
3. Charging time 2.5h
4. Play time: 7h (turn on light) 12h (turn off the light)
5. Channel system: stereo 2.0
6. Support protocol: A2DP, AVCTP, AVDTP, AVRCP, HFP, SPP, SMP, ATT, GAP, GATT, RFCOMM, SDP, L2CAP
7. Charging voltage: DC 5V
8. Frequency range: 2.402 ~ 2.480GHz
9. Transmission distance: about 10 meters (barrier-free)
10. Micro-SD card/built-in FM
11. Diameter: 40mm X 2
12. Sensitivity: 118 +/- 3DB