It isn't a microwave. It's your SENDIFICATOR!
Pretty much the only Crockertech you can bring yourself to use. It's just too handy not to.
You just type the coordinates, pop in the thing you want to sendificate, and hit the button. It'll sendificate that thing in a jiffy, assuming it's temporally allowed, and within size restrictions.
Obviously you can only send what you can fit inside there. You had to send Jake your brobot piece by piece, barely managing to squeeze that shiny melon head in there. He then dutifully assembled the robot himself. Poor fool, so jovially complicit in his own merciless jungle predation. It's all for the best, though. When you're through with English, he will be a ruthless killing machine. Mark your words.