It's a Truth Detector, Decoder and International Timepiece in One! Just ask a person a question as they hold two fingers against the watch's bio-feedback sensors. "The more bars appear on the screen, the less likely it is they are being honest. Look for other clues, such as rapid eye movement or a flushed face to help you decide." The one customer comment at the bottom of the screen says that it's "Better than expected." Not exactly a ringing endorsement, but I still can't imagine that the thing would be anything but useless at actually spotting lies.