1. Bluetooth 5.4
2. Chip: JL AC6983D2
3. Battery capacity: Charging case 300mAh, Earphone 30mAh
4. Usage time: 4 hours
5. Open the cover and take out the headphones to turn them on; Support master-slave switching, up and down song switching, summoning Siri, etc
6. Size: 58.5 x 56 x 27mm
7. Total weight: 44.8g