TomTom recently posted a video on YouTube detailing its car kit for the iPhone app released last week. The car kit for iPhone is a mount that connects to your window and features a built-in GPS, a feature the company said would enhance the GPS signal. That seems to be a good idea — in my tests TomTom consistently lost the GPS signal, while Navigon did not in the same areas.

The car kit also comes with a hands-free microphone for hands free calling, audio out so you can play music through your car stereo, and a speaker so you can hear instructions and phone calls.

You don’t need the car kit for the TomTom iPhone app to work.