Outdoor sirens  are often overlooked in favor of silent alarm systems. Yet, the very point of an alarm is to make an emergency situation known. What better way to do so than to stimulate the senses through a loud siren and a bright, flashing strobe? Mounting an outdoor siren serves several worthwhile purposes. First and foremost it is an in-your-face deterrent to an intruder who knows the home is protected and that he’s been detected. Because the sirens are not easily ignored, the situation will alert neighbors as well as anyone inside the home to warn them of the danger.