Explosion-Proof Remotely Selectable Electronic Siren - Multi-voltage design accepts 24VDC, 120VAC or 240VAC. Produces three user activated tones: wail, yelp and horn. Produces 101-108 dBa at 10 feet (111-118 dBa at 1 meter). Cast copper free aluminum housing, spun aluminum projector. Indoor and outd