Bluetooth Earbuds w/ display

 - Bluetooth version: V5.1

 - Maximum transmission range: within 15m

 - Touch control

 - Stereo sound

 - Music playing time: about 5-7 hours x 3 times

 - Earphone charging time: around 1.5 hours

 - Battery capacity (earphone): 3.7V / 50mAh x 2

 - Battery capacity (case): 3.7V / 400mAh