Chip: AD6983D2           Bluetooth: V5.3
Support: A2DP, AVRCP, HSP, HFP
Frequency: 2.402GHz - 2.480GHz
Receiving sensitivity (TYP): - 86dBm
Range: 10m
Capacity: 3.7V 25mA
Charging time: 2H
Music time: about 3.5 hours (80% volume)
Talk time: 3.5 hours (80% volume)
Standby time: 40 hours
Frequency response: 100Hz~20KHz
Speaker: full frequency speaker Φ 13mm@32  ohm
Microphone MIC: round microphone, - 42dB+- 3
Charging chamber capacity: 3.7 V 200mAh
Charging time: about 2 hours
Charging box battery full time: about 2H