New Soundwave toy goodness
He turns into a Cybertronian truck thingy... because kids like to push cars around and have no clue what a tape deck is.
But since he turns into a kinda boombox looking computer in the current video game, he has a pretty easy to figure out fan mode. Or just a third mode they left out of the instructions.
His guns even fit into his chest and look like cassette spools.