<ul><li>1. Magnetic Bluetooth handsfree has a Frequency response: 20Hz-20kHz</li><li>2. These Wireless headset has an Operating distance: Up to 10m (free space)</li><li>3. The Wireless handsfree has a Bluetooth profiles: A2DP, AVRCP, HSP, HFP</li><li>4. This Handsfree has Bluetooth version: V4.2</li><li>5. Bluetooth distance: 10 meters</li><li>6. Frequency range: 2.4GHz-2.48GHz</li><li>7. Standby time: Up to 50hrs</li><li>8. Battery: Built in lithium polymer battery</li><li>9.Talk/music playtime: Approximately 2-4 hours</li><li>10. Charging time: Approximately 1-2 hours</li><li>11. Frequency response: 20Hz-20kHz</li><li>12. Operational temperature: -10 to 50°C</li><li>13. Working Voltage: DC5V/130MA</li><li>14. Charging: Rechargeable.</li><li>Comes with local seller warranty.</li></ul>