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Material: ABS + Electronic Components: Ages 14 and up. Battery: 3 AA batteries not included. Voltage: 1.5 V. Weight: Approx. 23.2 oz (653 g). Size: Approx. 9.4 x 9.4 x 3.9 inches (24 x 24 x 10 cm). How to use: 1. Open the battery slot on the back and turn on the switch. and the current mode. Press the start button to activate the polygraph into prep mode and press the polygraph again to start polygraph 5. Every time you answer question, the polygraph measures your answers lie index. When the red light is turned on, the lie detector will scream and feel shock and intense finger bites Package List: 1 x Polygraph battery is not included + 1 x Manual