Instant Radio from Magicgadgets.com what I think...
It's called "Instant Radio" and it has to be one of the worst magical ideas I've ever heard of. You can go read their bold claims for yourself but here is my description of the effect:
The magician has someone draw a radio on a business card, they now hear a radio playing and think "wow he has got a small radio hidden in his pocket".
The magician takes any object and makes it look like it is playing music like a radio. The audience are amused at how he is able to secretly control a small radio that is hidden on his person.
No matter how you look at it - that is exactly what will happen. This is much like floating tricks that use thread where magicians fool themselves into thinking the audience is amazed and impressed at the magic when really they are just thinking "wow I can't see the thread" - it isn't magic.
When the method is the effect it isn't a trick. The only people this will fool is some magicians who will part with their hard earned wonga because they think having a really small radio is cool.
Maybe you could conceal one in the pocket of the satanic dish rag which would make it easy to toss two useless pieces of shit in the garbage at the same time.