This book discusses different designs of stun guns, electrical circuits, printed circuit boards, technology for self-assembly. About Taser: The taser is easy to use, does not take up much space in your pocket or lady's bag, and is a highly effective means for self-defense. Electroshock discharges have varying degrees of duration and tension, which affects the nature of the enemy's defeat, the effect varies from normal muscle contraction to loss of consciousness and being in a shock state from 5 to 30 minutes by the enemy. At the same time, the use of an electric shocker does not have dangerous consequences for the body, and can not lead to death. Exposure to the shocker is limited to impaired coordination of movements for a short time and neutralizes physical aggression from the enemy. Why do you need an electric shocker? An electric shock device will provide instant exposure and immobilize the offender for several minutes, without leaving any serious damage on his body, which can be regarded by the courts as exceeding the limits of the necessary self-defense Unlike, for example, tear gas, high voltage discharge will provide reliable protection from citizens who are in a state of alcohol intoxication or under the influence of drugs, as well as from dogs.