awei T61 Noise Reduction Dual Mic TWS Bluetooth Earbuds(Black)

1. Bluetooth version: Jerry 6973D4 V5.3
2. Supported protocols: A2dpavctpavdtpavrcphfpsppsmpattgapgattrfcommsdpl2cap profile
3. Battery capacity 35mAhx2 (without protection board, headphone board lithium battery protection IC)
4. Charging compartment battery capacity: 300mAh (with protective board)
5. Drive unit: F13mm diameter circular dynamic speaker
6. Charging time: about 1H
7. Call duration: 5H
8. Play time: 6H
9. Standby time: 300H
10. Speaker sensitivity: 115+/-3dB at 1KHz;
11. Speaker impedance: 32 ohms+/-15% at 1000Hz
12. Microphone sensitivity: -38+/-1dB at 1kHz 1Pa
13. Frequency response range: 20-20KHz
14. Bandwidth: 100KHZ-5KHZ
15. Impedance: 200ohms
16. Input charging standard DC 5V
17. Frequency response range: 2.4GHz
18. Transmission distance: up to 10M
19. Voice prompt: Support
20. Multipoint connection: Not supported
21. Wearing method: In-ear
22. Instructions: Chinese and English
23. Interface: TYPE-C
24. Waterproof level: IPX5
25. ENC noise reduction depth (4-mic call noise reduction): greater than -35dB