1, Bluetooth 5.4, chip: JL AC6973 2. Battery capacity: 300mAh charging case, 30mAh headset 3. Use time: 4 hours 4. Material: ABS；Size: 504621.5mm; Total weight: 43.4g 5. With LED intelligent touch screen, a variety of function settings can be directly operated by the charging bin 6. The screen displays the current power and accurate time of the earbuds and the charging case