awei T67 Air Conduction TWS Bluetooth Earbuds(Black)

1. Bluetooth version: V5.3 AD6973D4 (with power amplifier)2. Supported protocols: A2DP HFP AVRCP3. Battery capacity: 65mAh (The headphone battery does not come with a protection board, the headphone board has a lithium battery protection IC)4. Charging compartment battery capacity: 400mAh (with protective board)5. Charging time: 1.5H6. Talk time: 7.5H7. Play time: 8.5H8. Standby time: 200H9. Speaker specifications: 10*8.5*2mm square speaker10. Sensitivity: 119+/-2dB (800MV 1KHZ)11. Impedance: 30ohms +/- 15% Ohm, at 1KHz12. Output power: 21mW13. Microphone sensitivity: -42DB +/-214. Microphone impedance: 400ohms15. Air conduction TWS headphones: do not fit into the ears and reduce hearing loss16. Noise reduction method: Single microphone DNS call noise reduction17. Input charging standard: DC 5V18. Bluetooth working frequency: 2.402GHz-2.480GHz19. Frequency response range: 20-20KHz20. Transmission distance: Up to 15M21. Voice prompt: Support22. Wearing method: Earhook type23. Interface: TYPE-C24. Waterproof level: IPX4