The unit has a side audio jack for using the included audio patch cord and input music directly from another MP3/audio player. To the right of the jack is a swivel hinge which allows for 90 degrees of movement to adjust the player to your cars particular cigarette lighter orientation.
The bottom of the unit houses the included SD / MMC / USB drive connection port which allows you to use each of the sources independently to supply the music files for playback. Simply plug the drive or card carrying the MP3 audio files into the player, plug it into the cigarette lighter and it is ready for you to configure the FM station it will use.
That's about it. Nothing more to point out about such an easy to use product.
PRODUCT USE & TESTING
To test this product I used it both in my wife's Dodge Neon which is only equipped with a AM/FM radio and in my 2005 Chrysler 300C. The latter has a 378 Watt Boston Acoustic sound system with subwoofer and has the sound quality capability to point out any glaring playback problems.
Instead of my jabbering on about how it sounded, I decided to take a HD camcorder out to the car for a sound test.
Although I was limited to the pickup capabilities of the camcorder's microphone, the quality is higher in person but the video does represent its quality reasonably well. As noted, although the unit is supposed to support WMAs, it seemed to bring about an error during playback. But realistically, does anyone really use the WMA format for portable listening? I know I don't.
Please also note that there is no headphone connection so headphones cannot be used with this product. The car's speakers are supposed to be the main output source of the sound signal.