Awei A799BL Wireless Headset

Bluetooth Version: V5.1
Profile Support: HFP , A2DP , AVCTP , AVDTP , AVRCP ,
Stand-by Time: 100h
Talk Time: 25h
Music Play Time: 2h
Charging Time: 2h
Charging Voltage: DC 5V
Frequency Range: 2.402g-2.480g
Ambient Temperature:P -20/+45°C
Transmission Distance: 10m
Battery Capacity: 500mAh/3.7V
Driver Unit:40mm
Sensitivity:122dB ± 2dB
Impedence: 32Ω ± 15 %
Frequency Response: 20-40000Hz