I bought this a few weeks ago, and then forgot all about it until yesterday. It's the Bees Knees. Not only is it an MP3 player in its own right, but it's 3.5mm jack plug will also allow you to input any sound source. After inserting an SD card I plugged it into the cars Cigar socket, tuned in the car radio and that was it. Just to make things even better, it even has a USB input that will play from your Pendrive. The supplied remote control puts the icing on the cake.
A great buy at $9.48 from Dealextreme, delivered. I always use PayPal on this site.