Remotely Selectable Electronic Siren - Multi-voltage design accepts 24VDC and 120/240VAC. Produces three tones – wail, yelp and horn. Produces 107-111 dBa at 10 feet (117-121 dBa at 1 meter). Omni-directional swivel mount. Indoor and outdoor use. Type 3R enclosure (with WB back box). UL and cUL List