An iPhone Car Kit allows you to mount your iPhone whilst your driving, allowing you to concentrate on driving safely.
Whilst some are simply just a adjustable cradle, others offer more functionality, such as powering the iPhone from the cigarette lighter & doubling as a iPhone FM Transmitter, so you can listen to your iTunes through your car stereo.
They usually mount onto your windscreen using a suction cap, which makes it easy to position it in the best place for your eyesight.
Have a browse at the range of iPhone Car Kits below.