1. Bluetooth: 5.4
2. Chip: Blue trum AB5656C3
3. Battery capacity: Charging case 300mAh, Earphone 25mAh
4. Usage time: 3.5 hours
5. Material: ABS
6. Master slave switching, up and down song switching, summoning Siri and other functions
7. Open the cover, take out the headphones, and turn them on
8. Size: 47.5 x 45.5 x 24.3mm
9. Total weight: 31.8g