Product parameters:
-Colour: Black
-Bluetooth version: BT V5.0 + EDR
-Bluetooth transmission distance: 15m
Headphone battery capacity: 40mAh
Battery capacity of the charger box: 350mah, actual 450mAH (300 mA is written on the manual)
-Charging time: about 1 hour
-Music time: about 3-4 hours
-Standby time: 120 hours
-Support protocol: A2DP1.3 / HFP1.6 / HSP1.2 / AVRCP1.6 / D 11.3
-Applicable products: mobile phones, tablets and personal computers

Supplier provides parameters:
Bluetooth version: 5.0,
Transmission distance: 15 meters,
Battery capacity of the charging compartment: Actual 450mAH (300mA is written on the manual)
Headphone battery capacity: 40mAH
Charging time: about 1 hour
Standby time: 120 hours
Playing time: 3-4 hours
Operation mode: touch
Function: LED digital display, open the cover and automatically turn on, playback pause, call answering, song switching,
Material: ABS,