1. Function: battery display, call function, support music
2. Transmission range: 10 meters
3. Bluetooth protocol: 4.2
4. Built-in battery: 50 mAh lithium battery
5. Charging time: 30 minutes
6. Standby time: 80 hours
7. Play time: 3 hours
8. Channel: stereo
9. Whether single or double ears: unilateral hands-free,intelligent noise reduction
10. Color: black, white
11. Size: earphone: 2.3x3.2 cm, charger: 2.3x6.2 cm
12. Headphone weight: 4.4g/piece
13. Packing list: packing box x1, earphone x1 pair, charger x1, ear cap x3 pair, manual x1
14. Silicone ear caps, environmentally friendly materials, comfortable to wear
15. Artificial otology, stable to wear
16. USB charging base, magnetic design