Blueant S4

With the BlueAnt S4, there is no longer any need to touch your phone or car speakerphone while driving. For the first time, drivers can make and receive calls on the road using only their voice.
To activate the S4, all you have to do is say the hands-free trigger phrase "BlueAnt Speak to Me" and the S4 will be ready for your voice commands. To make a call, just say "Phone Commands" and the S4 will activate your phone's voice dialling feature.