1. Bluetooth: Version 2.1 Class 2.
2. Bluetooth Profile Support: Bluetooth headphone Bluetooth hand-free A2DP&AVRCP.
3. Distance coverage: 10Meters.
4. Frequency response: 20Hz-20KHz.
5. Sensitivity: <0.1%BER at -80dBm.
6. RF output power: -6dBm to 5dBm.
7. Music listening time: About 6 hours.
8. Battery: 3.7V / 260mAh rechargeable Li-polymer Battery.
9. Power: Input AC 100~240V DC 5V mini UCB plugs.