AnnoyingPCB is a great hidden prank noise maker. Irritate your co-workers, neighbors, or friends with this tiny sound device. It is just a little larger than the size of a quarter, so you can hide it under a desk, on a bookshelf, inside a closet, or behind a television... the possibilities are endless! Change the sound from a low beep to a hitch pitched screech or cricket chirp. Or, if you're really sinister, keep it nearby and pretend you don't hear it. AnnoyingPCB is made in the USA and includes one 3V Lithium battery, providing you with three years of pranking fun! Attention: AnnoyingPCB will not be held responsible for insanity, divorce, complaints to HR, unnecessary fire alarm battery replacement, or children cleaning their rooms trying to find what's beeping.