Removable battery design Bluetooth headphones

Specification: 
1. Bluetooth Version: BT6.0 AB8912/5756                 
2. Working Distance: 10m
3. Speaker: 13mm
4. Battery Capacity: Charging case 300mAh with protection board, Earbuds40*2mAh
5. Play time：6-7H
6. Case charging time：1.5H
7. Earbuds charging time：1.5H
8. Charging port: Type-C