Here is a smart pepper spray that not only helps you defend yourself but gets you in touch with your contacts when you are in trouble. The TigerLight D.A.D. 2 comes with military-strength pepper spray. It has a 150-lumen flashlight and Bluetooth crowd alert technology.
The D.A.D. 2 can send an alert with your location via your cell phone. It is compatible with iOS/Android devices. You can get it for under $130 at this time.