The SpectrAlert Advance series of notification appliances is designed to simplify your installations, with features such as: plug in designs, instant feedback messages to ensure correct installation of individual devices, and eleven field-selectable candela settings for wall and ceiling strobes and horn/strobes. More specifically, when installing Advance products, first attach a universal mounting plate to a four-inch square, four-inch octagon or double-gang junction box. The two-wire mounting plate attaches to a single-gang junction box. Then, connect the notification appliance circuit wiring to the SEMS terminals on the mounting plate. Finally, attach the horn, strobe or horn/strobe to the mounting plate by inserting the products tabs in the mounting plates grooves. The device will rotate into position, locking the products pins into the mounting plates terminals. The device will temporarily hold in place with a catch until it is secured with a captured mounting screw. SpectrAlert Advance products allow you to choose: • 12 or 24 volts • At 24 volts, 15, 15/75, 30, 75, 95, 110, 115, 135, 150, 177 or 185 candela by way of rear-mounted slide switch and front viewing window • Horn tones and volume by way of rotary switch The SpectrAlert Advance series includes outdoor notification appliances. Outdoor strobes and horn/strobes (two wire and four wire) are available for wall or ceiling. Outdoor horns are available for wall only. All System Sensor outdoor products are rated between minus 40 degrees Fahrenheit and 151 degrees Fahrenheit in wet or dry applications.