1, Bluetooth 5.4, chip: JL AC6973D4-2. Battery capacity: charging case 300mAh; headset 35mAh-3. Use time: 6 hours-4. Material: ABS；Size: 555520mm; Total weight: 32.2g-5. Support master-slave switching, summoning Siri, etc-6. Donut shape with breathing atmosphere light