The SE Series Speakers and Speaker Strobes feature high efficiency sound output with dual voltage 25/70 V capability and field selectable taps from 1/8 to 2 W. They are designed to provide a sleek, aesthetic appearance for emergency voice/alarm communication systems. All SE Series wall mount models mount to standard 4-inch x 2-1/8-inch electrical boxes w/ no extension ring required and incorporate a speaker mounting plate for faster installs. The grille cover snaps on so no mounting screws are visible. Attractive surface boxes are also available. These SE Multi-Candela ceiling appliances are part of the new family of ceiling mount strobe appliances that will also be available on strobes, horns, and horn/strobes. Optional Extender (SPEXT) is for mounting to 4-inch backbox w/ no extension ring. The SE Series Wall Mount Speaker Strobe models use low current draw strobes for wall mounted applications. Strobe options include MC strobes with field selectable candela settings of 15/30/75/110 cd or high intensity HMC strobes with field selectable settings of 135/185 cd.