1. Voice chat, communication without distance 2. It is clearer to answer calls at a distance of 10 meters 3. High-definition HIFI sound quality, enjoy music 4. Volume adjustment, easy to control 5. Sweat-absorbent, non-slip, skin-friendly and breathable 6. Removable and washable, USB charging port 7. Charging time: 2 hours 8. Playing time: 6-7 hours 9. Standby time: 48 hours 10. Function: battery display, call function, voice control, support music 11. How to use: head-mounted 12. Channel: stereo 13. Bluetooth protocol: 5.0 14. Power supply: USB charging / built-in lithium battery 15. Battery capacity: 180mah 16. Transmission range: 10 meters