1. Bluetooth 5.4, chip: JL AC6973D4 2. Battery capacity: charging case 300mAh, earphones 35mAh 3. Use time: 6 hours 4. Size: 55x55x20mm 5. Net weight: 32.2g 6. Support master-slave switching and summon Siri 7. Donut-style appearance, with breathing atmosphere light