Bluetooth Version :Bluetooth 5.0

Driver :7mm dynamic driver

Frequency Response :20-20kHz

Driver Impedance :16Ω±15% at 1KHz 1mW

Sensitivity :90±3dB at 1KHz 1mW

Bluetooth Distance :≤10 meters

Battery Life :4 hours ( single earphone )  14 hours ( earphones plus charging case）

Charging Time: Earphone 1.5 hours   Charging case 2 hours

Battery Capacity:  Earphone 50 mAh   Charging case 350 mAh