product parameters
1. Model: L7
2. Duration of music: 2 to 2.5 hours.
3. Line length: 60cm
4. Charging time: 0.2 hours
5. Call duration: 3 hours
6. Transmission range: 10 meters
7. Function: display battery call function support music multi-point connection
8. Bluetooth protocol: 5.0
9. Channel: stereo
10. How to use: headphones
11. Whether one or both ears: bilateral stereo