SST3-MV is an electronic siren capable of producing three different high decibel tones from the same unit. The model SST3-MV features internal amplification and the circuitry required to produce three different tones. The user activates each tone (wail, yelp or horn) with dry contacts from a remote point. The NEMA 3R housing is molded from impact-resistant ASA (acrylic-styrene acrylonitrile) plastic, making it resistant to UV light and ideal for indoor or outdoor use. The omni-directional swivel mount system allows the output to be pointed anywhere within a 180 deg half-sphere. The model SST3-MV can be used as a stand-alone, high output, audible warning device in any application where multiple tones are needed but voice paging is not required. Typical applications include emergency warning, start and dismissal, fire alarm, general alarm and evacuation.