Oteeto True Wireless Earphone – OT106 Chip: JL6983D2 BT CONNECTION Wireless: V5.3 Working Range: 10M Earphone Battery Capacity: 3.7V 25mAh Talk time: 3.7h Music time. 4.5h Standby time: 40h Battery Box capacity: 3.7V 300mAh Battery Box charging time: 2h