siren is the loudest self-contained dual tone alarm siren you can buy today. It can be installed indoors or outdoors. Our alarm siren is a great addition to any compatible security alarm system. The alarm siren is a 6-12 v dc combination speaker and siren driver.  alarm siren is dual tone – warble or steady. Additionally, our alarm siren is extremely loud as it has a 30 watt power rating. Sound level: 120db tone: Yelp & steady power: 6-12 dc current: 1,100ma dimensions: 8”w x 5.5”h x 9”l 30 day risk free trial add one to cart today if you don’t absolutely love  alarm siren, return it for a full refund within 30 days. No questions asked.