Here's a fun old item. This is especially interesting to compare to the devices of today, when you consider the size of this portable radio. ALL it did was play FM or AM radio. The design is rather colorful, with a static line across the speaker, and hot green & purple accents. The red knob is a bit out of the style but still sort of fits. This isn't a very "Sonic-ey" item, as the ONLY thing Sonic about it is the tiny little "Sonic X-Treme" logo near the dial. It's not a phony item as far as anyone can tell, but it is very unusual because it's merchandise for a game that was never released!
It's also kind of nonsensical because what does a radio have to do with X-Treme? Still, this is an interesting piece to collect if you can find it.