K22

chip solution:JL6973D
Bluetooth version:bluetooth 5.0 technology.
support:HFP, HSP,AVRCP,A2DP,3.2bits DAC,AAC
water resistant:IPX4
Speaker size: 10mm（dynamic)
Impedance: 32Ω+/-15%

Sensitivity: 100dB±3dB
Battery capacity: 55mAh(Both side).
Battery capacity charge case:400mA.
Battery life: hours:20 hours
Playback time: 5hours