SuperTooth Buddy Bluetooth Visor Speakerphone Car kit-Black
I've had this product a year and it's a great hands free kit for phone calls.  The audio quality is top notch and the batter life is amazing.  Beyond that it will even let you make calls while it is charging which is really nice.  It's been though  a hot summer and cold winter now and it holding up great.  As a word of warning my phone (ATT HTC) only allows this unit to pair for phone calls so I can't get it to take voice commands for text or email.