1. Bluetooth version: V5.3 2. Playing time: 10h 3. Battery capacity: 300mAh+110mAh 4. Frequency response: 20Hz-20KHz 5. Rated power: 5mW 6. Driver unit: 16mm 7. Input: 5V/1A 8. Standby time: 100h 9. Charging time: 1.3h 10. Digital power display, the power is clear at a glance 11. 16mm super loudspeaker, restore CD-level sound quality 12. Ergonomic design, fits the ear shape, and feels comfortable to wear,