Sure Guard Electronic Personal Attack Alarm (140 decibels includes 9V battery) PASC

Safety is paramount and with this personal alarm you can guarantee that you have an easy way to prevent attacks and alert others to an unwanted situation. With a loud alarm of 140 decibels, this alarm can be heard up to half a mile away. This is the perfect way to ward off any attackers as well as alerting passers-by to the possibility of danger. This alarm is easy to keep on your person with a compact design that is perfect for hassle free portability.