If you are looking for Bluetooth speakerphones that will help you get business done before your commute is even over, the K100 model from Plantronics is a great option. Available from Everything Authentic, the Plantronics K100 Bluetooth Speakerphones are designed to clip onto your car's visor.
It has dual microphones with a DSP (Digital Signal Processing) focus. This technology will cancel out not just background noise, but any conversations going on around you, singling out just your voice. It also has echo cancellation, making calls clearer on both ends. The in-car speakerphone also lets you stream music, podcasts and GPS through its A2DP-enabeld phones. It also has an FM transmitter (for playing audio through your car's speakers) and voice alerts. Its hands-free feature also means safer driving.