Specification:

BT Version: V5.1

Chipset: JL6983
Automatically power on/off
Wireless Protocol: HFP/HSP/A2DP/AVRCP
Operation Range: 10M(33Feet)
Earbuds battery: 40mAh
Battery capacity for charge base: 350mAh
Playing time: Up to 5 hours
Charge input: DC5V-1A
Charging time: Earbuds: 30mins, Charging case: 2H