- Bluetooth version: 5.4, chip: JL AC6983-2. Battery capacity: 300mAh charging case, 30mAh headset-3. Use time: 4 hours-4. Material: ABS；Size: 60.645.221.7mm; Total weight: 57.6g-5. Support master-slave switching, up and down song switching, summoning Siri, pressure-sensitive operation and other functions-6. It does not support the reset function of pressing and holding the button