1. Bluetooth version: 5.4, chip: JL AC6983 2. Battery capacity: 300mAh charging case, 30mAh headset 3. Use time: 4 hours 4. Size: 49*46*20.2mm; Total weight: 40g 5. Support master-slave switching, up and down song switching, summoning Siri, sliding tuning, pressure-sensitive operation and other functions 6. It does not support the reset function of pressing and holding the button
