awei T20 Bluetooth 5.1 True Wireless Headset(Black)

1. Bluetooth version: Jayli V5.3 AD69732. Battery capacity: 45mAh x 2/Charging cabin capacity 400mAh3. Driver unit: 9mm4. Charging time: 1.5H5. Calling time: 5.5-6.5H6. The best call distance: about 1M7. Maximum transmission distance: about 10m8. Support voice prompt9. Frequency response range: 20-20000Hz10. Type-C interface11. IPX4 level strong waterproof and sweat -proof