Product information:

Item: M19 Bluetooth headset
Transmission range: 10 meters
Function: Power display, call function, voice control, support music
Bluetooth protocol: 5.0
Channel: Bilateral stereo
How to use: Earplug type
Battery: Polymer lithium battery, earphone 50mah, charging compartment 400mah
Playing time: Single ear: 5-6H; opposite ear: 4-5H
Standby time: 100H for single ear, 60H for opposite ear
Full charge time: About 1 hour for earphones, about 2 hours for charging compartment