Made of high-quality ABS material, durable in use. Safe voltage is harmless to the human body, but it is not suitable for babies, heart disease and hypertension patients. Put tester's fingers on the sensing slots of the lie detector, it will punish the liar when his heartbeat speeds up. Party Games: Most fun game at a party. Ask any question and see what happens. It's really fun to watch people get nervous. This is a really fun game to play with a group friends. Creative: Fun for person thinking of crazy questions. To the person squirming trying to answer. Hilarious to watch. Cool way to make you sweat bullets. Toys for your friends, Fool's Day Party, Prank gifts, Halloween Prank, Christmas gift.