1. Portable and delicate, be easy to taking and be free to use in office and car. 2. Bluetooth handsfree car kit for all kind of Bluetooth mobile phone. 3. Professional DSP technology for digital noise & echo suppression system. 4. Automated saving power mode without operation after10 minutes, can continuously stand by 170 hours for calls in 8 hour. 5. Voice dialing, redial function. 6. Auto loudspeaker mute 7. Remote control function (AVRCP profile). 8. High sensitive microphone.