1. Bluetooth 4.2 chip, with faster transmission speed and longer transmission distance. 2. In-ear fit auricle design, wearing the ear for a long time does not cause pain. 3. Earphone battery capacity: 60mAh. 4. Charging box battery capacity: 500mAh. 5. Transmission range: 8-10m 6. Charging voltage: 5V 7. Charging time: about 1 hours 8. Play time: 2-3 hours 9. Talk time: 3-4 hours 10. Standby time: 7-10 days