Bluetooth: V5.1
Intelligent touch control
Supports switch up and down songs
**Earphone with  Li-on battery protection 
Chipset: JL AD6973
Earphone Capacity: 40mAh
Charging Case Capacity:  320mAh
Speaker: moving coil type 13/32 ohm
Play time: 6.5 hours
Earphone full charge time: 1 hour
Bluetooth transmission distance: 10-15 meters