Treo car kits enable you to position your Treo for use in your car. Car kits add a degree of safety by positioning the Treo before you set off and enabling you to see who is calling without needing to fiddle about finding and holding your Treo. For added safety they can be easily combined with a wired or bluetooth headset for total handsfree experience. A few offer charging options and some offer bluetooth speakerphones. Very few are made for a specific type of Treo or even smartphone so you will not have the compatibility issues that exist for other kinds of Treo accessories. Treoshack have a wide variety of Treo car kits ranging from Plug'n Talk to Integrated Installation.