parameter
1. Bluetooth version: V5.0
2. Frequency response: 20hz-20khz
3. Sensitivity: 103dB SPL +/- 3db
4. Support protocol: HSP / HFP / A2DP / AVRCP
5. Impedance: 16 ohm
6. Voltage: 3.3-4.2 V
7. Power: 5mw
8. Battery capacity of charging compartment: 400mAh
9. Headphone battery capacity: 45mAh
10. Music time: about 3 hours (percent 80 volume)
11. Talk time: about 3.5 hours
12. Standby time: about 80h
13. USB charging time in the charging compartment: about 1h
14. Wireless charging time in the charging compartment: about 3h
15. Headphone button control: touch control
16. Product size (charging box): 44x22x53.8mm
17. Product weight: about 41g

feature
1. New upgrade of Bluetooth 5.0, lossless transmission and faster speed
2. Touch technology, size 1:1, comfortable to wear
3. Intelligent noise reduction, clear bilateral communication, newly upgraded stereo dual channel
4. Easy experience, no button touch technology, new SIRI call function
5. Strong power reserve, standby time up to 80 hours (T03 charging bin 350, T03S charging bin 400mAH)
6. Support wireless charging function
7. Compatible with iOS/Android
8. 8 Pin charging interface
9. Note: This product does not support pop-up function