Sheldon: All right, pick a card.
Howard: What's with the wand and the beep?
Sheldon: The wand is called showmanship, and the beep is none of your business. Oh, excuse me, I'm getting a text message completely unrelated to this magic trick. Oh, look, my dry cleaning's ready. And your card was the five of spades. Ta-da.
Raj: These cards have bar-codes on them. The wand is a reader. It's transmitting to your phone.
Sheldon: I said, ta-da. Show's over.