The CAV120-X operates at 120V AC and combines a single flash strobe light with a Piezo alarm, each with a separate power wire and a common ground. They may be wired together or separately depending on the application. The Piezo measures 87 dB at 1 meter. The CAV120-X features a Fresnel lens (polycarbonate), aluminum flange base, and linear strobe bulb (part # L2-77). Replace the last "X" in the part # with the lens color of your choice when ordering.