1. Bluetooth 5.4 AC6983D2; 2. Battery capacity: Charging case 300mAh, earphone 30mAh 3. Usage time: 4 hours 4. Size: 50*46*21.2mm; Total weight: 42g 5. Support master-slave switching, up and down song switching, summoning Siri and other functions 6. It does not support the reset function by pressing and holding the button
