Product specifications:

Product model: TWS-M3                             
Specification: 72×38×30mm
Working voltage: 3.3V-4.2V
Bluetooth version: V5.0+EDR
Battery capacity: 45mA/350mA
Use time: 3-4 hours
Standby time: about 60 hours
Speaker type: titanium composite membrane
Transmission range: 2.40GHz2.48GHz
Sensitivity: 98+3dB
Communication distance: effective distance 15 meters
Ear way: obliquely into the ear to fit the contour of the ear

Package list:

2xBluetooth earphone 

1xEndurance charging box 

1xcharging cable 

1xUser's manual 

1xEarplug silicone cap