Here is a handy device that does it all. It’s the Swiss army knife of car mounts. First, plug it into a 12V cigarette lighter to securely hold and charge your iPhone 3. It is perfect for sending and receiving calls hands free, you don’t want to get a fine for making a call while driving do you? Many car stereos do not have an auxiliary input and if that is the case, this car mount is also a powerful full range FM transmitter to send your tunes right to the FM dial on your stereo. It has full range so you are sure to find a clean frequency to transmit on and the sound is great. You can easily keep track of your own personal station with the easy to read 1.2” LCD readout. You won’t have to worry about running down your battery either because this unit will be charging your phone all the time. If you don’t want to listen to the media on your iPhone, no problem because this transmitter has its own 3.5 mm input and USB power source to power and play any MP3 player. It’s a really versatile little unit and a perfect addition to your car.