We need security in our life. And I think the most important kind of security is the physical security. It is not about the best way on how to lock your house’s doors but it is more to how can you protect themselves in case something bad happens to you. When you are walking alone on the street, and suddenly some bag guys come and try to do bad things to you, what will you do? Will you be able to defend yourself without proper devices? There are some devices that you might be able to use to defend yourself. There is pepper spray to temporarily blind the bad guys for example. This kind of protection device is totally harmless and will never give the victim permanent injury. This device is just a way to distract them and give you enough time to run away.