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This Lie Detector is specially designed to sense these frequency changes and measure and analyse them. This Lie Detector instantly recognises patterns in a person's voice and displays the analysis results on an LED band as the person speaks. The band moves through green, amber and red in a traffic light stylee. If the green LEDs light up, the speaker is fairly stress-free and more than likely telling the truth. If the reds light up, stress levels are high, and the speech is a lie. It measures 14cm x 8cm x 2.5cm and uses 1 x 9V battery which is not included in this package.
