Electronic magic does not have to be expensive!
Vintage model (note: because it is handmade, each model could be different from the photos.This is a simple Desk Bell that everyone knows. About 3.38 in base. But, it is Remote Controlled !!!! (Can be used as a normal bell too) Remote control range, about 10 feet.

THIS NEW MODEL is EXAMINABLE, which means, you can even give it to the spectator to hold it in their hand, and it will ring in their hand. And the remote is so tiny that you can place it in your sock and the activation switch on your toe, or, under your arm, or in your pocket, anyway, wherever you prefer.

At your command, the Bell will ring. Just imagine the tricks or pranks you can do using this unit. Example: You can ask someone to select a card and spread the cards on the table (you control the card, and you know where is it). So you ask the spectator to keep pointing one by one, and when he touches the right card, the bell rings !!!. Or you can play (Don't Lie) , asking questions, and ask the spectator to press the bell, whenever is TRUE and do not, when it is a LIE, and you press the remote control when should be a LIE. Anyway, it is up to you to produce the magic trick. You receive the Remote control Bell, Remote handset, all charging cables and instruction manual. Bell uses Lipo Battery rechargeable (no need to change batteries), and you receive a recharging cable. The remote uses normal batteries (supplied) You can see demo on youtube....https://www.youtube.com/shorts/Q0QwRivER_c