Parameter
1. Bluetooth version: V5.0
2. Frequency response: 20hz-20khz
3. Sensitivity: 103dB SPL +/ -3db
4. Support protocols: HSP/HFP/A2DP/AVRCP
5. Impedance: 16ohm
6. Voltage: 3.3 - 4.2 V
7. Power: 5mw
8. Battery capacity of charging bin: 400mAh
9. Earphone battery capacity: 45mAh
10. Music time: About 3h (80% volume)
11. Call time: About 3.5h
12. Standby time: About 80h
13. Charging bin USB charging time: About 1h
14. Charging bin wireless charging time: About 3h
15. Earphone button control: Touch control
16. Product size (charging bin) : 44x22x53.8mm
17. Product weight: About 41g

Feature
1. Bluetooth 5.0 new upgrade lossless transmission faster speed
2. Popup pairing new upgrade pair and connect automatically when open the charging bin
3. New touch control technology 1:1 size comfortable to wear
4. Intelligent noise reduction bilateral clear communication new upgraded stereo dual channels
5. Easy experience with no button touch technology new SIRI call function
6. Powerful power reserve long standby time of 80 hours (T03 charging bin 350 T03S charging bin 400mAH)
7. Support wireless charging function
8. IOS/ Android compatible
9. Lightning charging interface