Not a magician, just watch tricks occasionally and enjoy thinking about how they're made. I wouldn't necessarily expect the monitor to be visual as card tricks

Not a magician, just watch tricks occasionally and enjoy thinking about how they're made. I wouldn't necessarily expect the monitor to be visual as card tricks usually just need knowledge of a couple of cards. This could be communicated through sound (e.g. discrete earpiece or bone conduction headphones) or even haptics (e.g. Morse code vibrations from a phone in a pocket). As for the scanner, it'll depend on the trick, the goal is just to hide a camera. It could be concealed in a prop or an item of clothing. The scanning could even be incorporated into the trick, for example by sealing the cards immediately in a "safe".