K28

Bluetooth version:bluetooth 5.1
technology. JL6983
support:HFP1.7,1 HSP,1.2AVRCP,A2DP1.3,AAC
water resistant:IPX4
Speaker size:13mm（dynamic)
Impedance: 32Ω+/-15%
Sensitivity: 100dB±3dB
Battery capacity: 40mAh(Both side).
Battery capacity charge case:400mA.
Battery life: hours:20 hours
Playback time:6 hours
charging mode:Type-C
OVP 20V