- Bluetooth 5.4; chip: JL AC7003-2. Battery capacity: 300mAh charging case, 30mAh headset-3. Usage time: 4 hours-4. Material: ABS; Size: 60.6 * 45.2 * 21.7mm; Total weight: 57.6g-5. Support noise reduction, master-slave switching, up and down song switching, summoning Siri and other functions“