awei T66 ENC Noise Reduction TWS Bluetooth Earbuds(Black)

1. Bluetooth version: V5.3 AC6976D82. Support protocols: HSP, HFP, A2DP, AVRCP3. Battery capacity: 35mAh x 2 (without protection board, headphone board lithium battery protection IC)4. Charging compartment battery capacity: 300mAh (with protective board)5. Drive unit: Diameter 13mm6. Charging time: 1H7. Call duration: 5H8. Play time: 6H9. Standby time: 200H10. Use time of headphones + charging case (80% volume): 20H11. Sensitivity: 108+/-3dB12. Speaker impedance: 32ohms13. Input charging standard DC 5V14. Frequency response range: 20-20K Hz15. ENC bandwidth: 100Hz-3KHz16. Transmission distance: up to 15M17. Speaker: diameter 13mm18. Voice prompt: Support19. Multipoint connection: Not supported20. Wearing method: Semi-in-ear21. Instructions: Chinese and English22. Interface: TYPE-C23. Waterproof level: IPX624. ENC noise reduction depth (4-mic call noise reduction): Greater than -40dB