Model:ML-BH68

Bluetooth Version: V5.0+RTL 8763B

Working Distance: within 33ft/10M

Music Playtime: 4 hours

Calling Time: 5 hours

Battery Specs: li-polymer 3.7V,40mAh

Charging dock:300mAh

Charging Time: about 1.5 hours

Speaker Spec: Dia 10mm

Comfortable size,  touch control, Auto power on/off and pairing, magnetic charging dock, next/previous song, volume +/-, Dual speaker on call, Siri