The stun gun is a kind of tool used by police and people to maintain public security and self-defense. It is unlike firearms weapons. It is a safe and practical security tool. But it can't use the bullets to control the criminals from a long distance like a firearm, and the stun gun must be touched the criminals to carry out the stun gun and play its role.

Among the known stun gun, there are mainly electric batons, pistol-type stun gun, and flashlight dual-purpose stun gun. These stun gun are composed of discharge contacts, high-voltage boosting circuit, DC power supply, and outer casing, and utilize high-voltage discharge principle,an electric shock was applied to the offender.

The stun gun is release the high-voltage pulse of electric by DC-converted energy to the gangster to interfere with the human neuromuscular. The high-voltage generator and the rechargeable battery are used to generate a strong electric shock of more than 40,000 volts to Hit the target, so that the target is lost Perception, numbness in the limbs, limited movement in a short time. 

The working principle of the stun gun is actually very simple, that is, the high-voltage pulse causes interference to the human body. Usually a 7.2 volt power supply in the stun gun can generate a high voltage of more than 40,000 volts, which is very suitable for use in defense and self-defense.