How does a stun gun work?

A stun gun is a self-defense tool that releases an electric shock from one end of the device. This device is useful when used against an attacker because its painful shock will distract them. Giving you time to get away and call for help. 

When the stun feature of the tool is activated, it sends out a high-voltage electrical current. The sound it makes is a loud zap and at times can be enough to scare away threats. When the current makes contact with a person it is not only painful, but a literal shock to their body. This will distract them and may also temporarily disorient a person, giving you time to run away.