Bluetooth Version: V5.2
Chipset: Bluetrum 8922E
Profile: HSP, HFP, A2DP,AVRCP
Impedence: 32Ω
Frequency Range:20-20kHZ
IPX level:IPX4
Sensitivity:98dB
DB noise reduction: yes 22s±3dB
Battery:40mAh\250mAh
Driver Size:10mm
Charging port type: Type-C
Charging Time: About 1.5hours
The numbers of re-charge: 2~3 times
Playing Time : 5-6.5Hours
