The iO-WWS is an electronic siren that can produce two different sounds from a single input trigger. ComboTrigger technology gives single alarm output controls the ability to activate burglar and fire alarm sounds. Mounting is a breeze with the removable U-shaped bracket. The iO-WWS not only produces high-quality siren alerts on a relatively low-current, but its small size makes it easy for installing in vents, attic eaves, and soffits. Technical Specifications: Operating Voltage: 6 to 14 Volts DC Current Draw: 1.2 Amps Sound Level: 118 db @ 1 meter, 14 vdc Size: 4" x 4" x 3.5" D4"