Characteristics and Interoperability One Micro Electric Shock Lie Detector is included in the package. Three "AA" batteries are needed, but they are not included. 【Fortunate Electric Finger Games� Play 2–6 Put your finger into the small, light random rotation in the game. When the voice stops sobbing, the indicator light—which refers to the player—will turn on, shocking the "loser" fingers. The portable lie detector is a tabletop gadget that makes a great gift for friends, Halloween pranks, Christmas presents, and April Fool's Day celebrations. This is a wise purchase that would make a wonderful gift for your friends. WARM REMEMBER ME: Although the polygraph is not 100% accurate because this is not a professional tool, it is still a lot of fun to play with friends.