Wheelock Model MTWPA-24MCCH-NW Weatherproof General Use horn/strobe. This is not your typical fire alarm.. in fact, it isn't. These are used for anything but a life safety system. Selectable candela options - 115/177. Runs on 24VDC. Comes with mounting screws, screw covers, wire jumpers and literature. Can be mounted in any double-gang box.