More gadgets like this: here
Here is a device that could work great for pranksters. The Annoying Sounds Machine makes annoying sounds, so you they will have more ways to pull off their evil games. Sound effects include nails on a chalkboard (my favorite), dentist drill, siren, Vuvuzela (lovely), and mosquito. These sounds probably don’t work on everyone. That does not mean you should not try them.
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