Bluetooth version: 5.3

Call time: About 3.5 hrs

Play time: About 3.5 hrs

Transmission distance: About 10m

Standby time: about 40 hrs for headphonesabout 300 hrs for standby with charging case

Earbud charging time: About 2 hr

Box charging time: About 2 hrs

Bluetooth protocol: HFP/A2DP/HSP/AVRCP

Earphone batiery capacity: 3.7V 25mAh

Charging box batiery capacity: 3.7V 300mAh