1. Headphone type: Air conduction bluetooth earphone 2. Bluetooth version: V5.0 3. Transmission distance: 10m 4. Bluetooth chip battery capacity 150mA 5. Frequency range: 20HZ-20KHZ 6. Charging time 1.5 hours 7. Play time about 6 hours 8. Working temperature: -20℃ ~ 70℃