Death Clock
From Futurama Wiki
The Death Clock was an invention created by Professor Farnsworth. When someone would push a button on the top of the clock, it would make a sound and print a small read-out displaying the future-date for that person.
Professor Farnsworth intended to present the Death Clock at the annual inventor's convention, but he was forced to make up an invention on the spot when he was informed that he presented it the previous year.
