awei T13Pro Bluetooth Sports Headset(Black)

1. Bluetooth version: Jayli V5.3 (upgraded version, ultra -low power chip) AD6973D42. Battery capacity: 50mAh x 2/Charging cabin capacity 300mAh3. Driver unit: 8mm4. Charging time: 1.5H5. Calling time: 9H6. The best call distance: about 1M7. Maximum transmission distance: about 10m9. Support voice prompt10. Frequency response range: 20-20000Hz