The Stunning Ring is a self-defense ring with replaceable pepper spray. It uses the strongest pepper spray formula available on the market today. The formula has the industry’s highest heat rating of 2 million SHU (compared to a jalapeno pepper, which is 5000 SHU), which severely affects the mucous membranes (eyes and respiratory systems). The ring has 2-3 one second burst and has an effective range of 12 inches.
Source: Protect Yourself Direct