Battery information The battery is NOT in the delivery contain. You should buy the battery yourself. Besides, the power supply is 3 pieces of AAA batteries. So it's easy to use. Interactive Toy Get your friends to shock you with the truth or you can shock them with their own lies. How to play With a built-in lie detector, the shock game will display on a practical LED display with two settings, truth and lie, and a light-up spectrum to tell the truth of a response. Best Party Toy This is an interesting and little scary liar shocking game. You can test someone or your friends if they tell the truth in the truth or shocking game. It would be a great warm-up game at a party. Notes Not suitable for wearers of pacemakers, epileptics or the weak. The strength of the storm is limited in a safe area. That's why it's just for play, electricity will not really hurt you. Best Party Toy -- This is an interesting and little scary liar shocking game. You can test someone or your friends if they tell the truth in the truth or shocking game. It would be a great warm-up game at a party. Interactive Toy -- Get your friends to shock you with the truth or you can shock them with their own lies. Double Play Mode * Current mode. When your liar index have a certain level, it will give you a shock. * Vibration mode. When your liability index reaches a certain level, your hand will undergo a violent shock. Power Supply: 3 x AA batteries (Not included) Product Size: 16*8cm / 6.3*3.1in Package Weight: 316g (approx.) Package List: 1 * Lie Detector Identification Lamp for True and False A polygraph will be measured if you lie and the level of lies. If you lie, there will be a LED indicator indicating how much you lie. There are 5 levels of indicators, 3 green and 2 red. The lighted, the more you lie. When all the lights are lit. Then you will be punished by an electric shock. The Use of Induction Machines Attach your hand to the induction table, it will detect if your hand is placed on the polygraph platform, otherwise an alarm will sound if your hand is placed on the polygraph platform, the polygraphy game it's time to prepare for answer the questions!