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

1. Bluetooth version: Jerry 6973D4 V5.32. Supported protocols: A2dp\avctp\avdtp\avrcp\hfp\spp\smp\att\gap\gatt\rfcomm\sdp\l2cap profile3. 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 speaker6. Charging time: about 1H7. Call duration: 5H8. Play time: 6H9. Standby time: 300H10. Speaker sensitivity: 115+/-3dB at 1KHz;11. Speaker impedance: 32 ohms+/-15% at 1000Hz12. Microphone sensitivity: -38+/-1dB at 1kHz 1Pa13. Frequency response range: 20-20KHz14. Bandwidth: 100KHZ-5KHZ15. Impedance: 200ohms16. Input charging standard DC 5V17. Frequency response range: 2.4GHz18. Transmission distance: up to 10M19. Voice prompt: Support20. Multipoint connection: Not supported21. Wearing method: In-ear22. Instructions: Chinese and English23. Interface: TYPE-C24. Waterproof level: IPX525. ENC noise reduction depth (4-mic call noise reduction): greater than -35dB