Features:Lie Detector is a really fun toy to play with your friends, especially for truth party game. The polygraph has two kinds of punishment functions: Electric Shock or Vibration. Put tester's fingers on the sensing slots of the lie detector, it will punish the liar when his heartbeat speeds up. Made of premium ABS material, sturdy in use. Powered by 3 x AA batteries (Not included), easy to use. Specification:Power Supply: 3 x AA batteries (Not included)Product Size: 16x8cm or 6.3x3.1inPackage Weight: 316g (approx.)Package List:1 x Lie DetectorNote: 1. The current generated by this product is harmless to human.2. Do not use in patients who strongly respond to electric shock.3. If the lie detector test can not trigger the electric shock or vibration effect, please lie detector test in the same mode a few more times, until triggering 2 and more lie red light, do not frequently switch modes, because switching modes will reset the number of lie detector tests, and may not trigger the electric shock or vibration effect.4. If the lie detector test triggers a vibration and fails to trigger an electric shock, try again by wiping the finger touch point with a damp paper towel. .