Install Car Kit With Antenna and Mount. Promotes safer driving by allowing complete hands-free use of your Treo 600 smartphone in your car. Cradle holds your Treo securely in place and doubles as a charger. Integrated speaker and visor-mounted microphone eliminate the need to hold the phone or wear a headset. Noise reduction and echo cancellation provide clear sound--even at highway speeds. External antenna provides improved reception. Two installation options (plug-and-play or hard-wired).