1, Bluetooth 5.3; chip: JL AC69832, Battery capacity: charging case 300mAh; headset 30mAh3. Use time: 4 hours; Standby time: 150 hours4, Size: 60.6*45.2*22mm; Total weight: 57.2g5. Support master-slave switching, up and down music switching, summoning Sir, pressure sensitive operation and other functions