This is a wonderful design, and so much nicer than older personal alarms like air horns and pepper spray. It attaches to keys, purse, belt, etc. and provides a loud sound and light.I'm a little underwhelmed with the sound - it is loud and may attract attention. But so many people ignore car alarms they may do the same with this. It doesn't have the obnoxious, hurt-your-ears sound that would really deter someone from moving forward.The light is nice, but keep your cell phone light and a real flasSee full review