1. Bluetooth 5.3; chip: JL AC6983D2 2. Battery capacity: charging chamber 400mAh; Headset 30mAh 3. Service time: 4 hours; Standby time: 150 hours 4. Size: 51 * 49 * 30.5mm; Total weight: 45.2g 5. LED digital display of power 6. Support master-slave switching and calling Siri