Product information:

Transmission range: 15 meters
Function: battery display, call function, voice control, support music
Bluetooth protocol: 5.0
Channel: Stereo
How to use: earplugs
Whether single or binaural: bilateral stereo
Color: in-ear, semi-in-ear
Battery life: 100 (hours)
Battery capacity: 3.7V/40mAh
Music playback: 3.5 hours
Charging time: 1 hour
Wireless headset version: V5.0
Charging compartment charging voltage, DC5V
Battery capacity: 3.7V350mAh
Charging time: 1 hour

Packing list:

Bluetooth headset*1, charging compartment*1, manual*1, USB*1