Product information :
Transmission range: 20 meters
Function: battery display, call function, support music, multi-point connection
Bluetooth protocol: 5.0
Channel: Stereo
How to use: earplugs
Colour: Black

Headphone battery capacity: 40mAh x2
Charging compartment battery capacity: 380mAh
Playing music time: 4.5 hours
Charging parameters: 5V, 500mA
Head charging time: 1 hour
Charging time of charging box: 2 hours

Size Information:
Color box size: 125*85*35mm

Packing list:
Headphone*1