Specification:

Bluetooth version：V5.1

speaker size：Ø13.0mm

frequency response：20Hz-20KHz

sensitivity：100±3db

BT range：≥10m 

battery capacity：

earbuds 35mAh，charging case 300mAh

Playing time：5.5H

Total playing time（earbuds+charging case）：

around 21H

Standby time：87H

Charging time: earbuds 1.5H, charging case 1.5H