BlueAnt S4 Bluetooth Car Speakerphone Kit [USEN-BAW-S4]
The design of this kit is great- the magnetic clip, the power saver function, the auto import of contacts, the voice commands, etc.  The only disappointment, and a big one at that considering the primary function of this device, is that it does not pick up your voice very well to relay it to the person you are talking to.  Most of the people I call say that they can't hear me, and when I switch this kit off and turn my phone speakerphone on (which is placed equally far away in a car dock), they can hear me 