The Multi-Tector Detector Device is a nifty little gadget that will help you detect Dorks, People who Suck, Geniuses, Idiots, Liars, and Crazy People all with the flip of a switch! Just set the top dial to what you'd like to detect, and then in a crowded room, either use the touch sensors underneath to set off a "tick" sound when you get close tot he "crazies", or point the thing right at a "loony" and press the top button to activate a red light and an alert sound. Button cell batteries included!