Now you can have your personal protector on you and no one will know what you have until it's too late...
You have what look like cell phones, a felt tip marker or pen, and even flashlights. These disguised stun guns enhance your ability to protect yourself by allowing a surprise defense.
Having a self defense weapon that doesn't look like one can be a good idea in a lot of situations. You don't always want people to know you're "carrying" and having the element of surprise is a smart tactical advantage.
Certainly, if someone doesn't think you can do anything about it, they won't be expecting a barrage of electricity getting pumped into their body. This surprise defense gives you the time and opportunity to get away and get some help.