The emergency alarm can make a loud sound to draw attention to protect you from having an emergency even at distances as far as 500 ft. The personal alarm has a portable size, can be attached on women's bags, backpacks, school bags, belt loops, suitcases, keys, dog belts and so on. The self defense siren alarm has a great built in LED Flashlight, which is very helpful for hiking, travelling, camping and dog walking at night.