Specification：

1. Bluetooth version: V4.1

2. Bluetooth distance: 10 meters

3. Frequency range: 2.4GHz-2.48GHz

4. Operating distance: Up to 10m (free space)

5. Bluetooth profiles: A2DP, AVRCP, HSP, HFP

6. Standby time: Up to 50hrs

7. Working Voltage: DC5V/130MA

8. Charging: cable included (no adaptor)

9. Battery: Built in lithium polymer battery

10.Talk/music playtime: Approximately 2-4 hours

11. Charging time: Approximately 1-2 hours

12. Frequency response: 20Hz-20kHz

13. Operational temperature: -10 to 50°C