1. Built-in 2 microphones with ANC technology, bringing heavy bass 2. Bluetooth 5.0 BES2300 chipset with many functions 3. The microphone has noise reduction function, and the call is clear 4. Touch control in ANC/transparent mode 5. 21 hours battery life a day 6. IPX5 waterproof and sweatproof clothing, suitable for all activities 7. Ergonomic in-ear safety fit, comfortable to wear 8. AAC codec for high-quality audio 9. Earmuffs of extra size/material, easy to wear 10. Headphone battery: 55mAh, case battery: 400 mAh 11. Standby time: 100 hours 12. Charging current: 45mA 13. Charging time: 1.5 hours 14. Fully charged: 3 times 15. Material: ABS 16. Interface: Type-c 17. Size: 60x 60x32.61mm