Bluetooth: V5.1
Touch control
Supports dual calling & SIRI
Supports switch up and down songs
Automatic pairing/charging/power on/power off
Chipset: Bluetrum 5616A
Earphone battery: 40mAh
Case battery:  300mAh
Playtime:6.5 hours
Fully charging time: 1 hour
Bluetooth distance: 10-15 meters