Our keychain contains water, chili extract. It can cause a burning sensation in the eyes, skin and nose; Invisible UV dye for marking attackers; Irritates the respiratory system and causes coughing. The way to use it is simple: When confronted with harassment, you can spray the spray into the eyes or face of the bad guy to buy time and a chance to escape. Pepper spray can make bad guys have difficulty breathing, impaired vision, and a burning sensation on the skin, which can make bad guys leave quickly.