Bluetooth solution:V5.4

Earphoone battery capacity:25mAh*2

Charging box capacity:300mAh

Transmission distance:10 meters

Speaker Size:6mm

Impedance:16Ω±10%

Noise Reduce:about 15db

Frequency Response:20Hz-20KHz

Playing Time:about 3-4 hours

Call time:about 3-4 hours

Charging time:about 1-2 hours

Charging Interface:Type-C