1. Bluetooth 5.3; chip: JLAC6983 2. Battery capacity: charging case 350mAh; headset 35mAh 3. Service time: 4 hours; Standby time: 200 hours 4. Size: 53.8 * 44.3 * 21.5mm; Weight: 43g 5. Support iPhone pop-up window 6. Function customization and positioning are not supported. Does not support in ear detection and wireless charging