1. Bluetooth 5.4, chip: JL AC6983
2. Battery capacity: charging case 300mAh; Headphones 30mAh
3. Use time: 4 hours
4. Size: 54 x 51 x 25.5mm; Total weight: 62.8g
5. Support master-slave switching, up and down song switching, summoning Siri and other functions
6. Lightweight earplugs allow you to enjoy uninterrupted sleep.