Spraytect is an iphone case that has an interface in the back for installing an optional pepper spray cartridge.
When the pepper spray cartridge is removed, it functions just like a regular phone case. The back is relatively flat without the cartridge so that you can carry your phone in your pocket or lay it flat on a surface.
The pepper spray cartridge is installed through a simple sliding action. Once installed, there is a 3-step firing safety mechanism to prevent accidental discharge.
When the cartridge is installed, it can optionally be used as a stand for the phone, which is kind of a bonus feature rather than the intended function.