Audible and Strobe Guard, Open w/Conduit Knockout Back, Indoor, Color Clear, Material Polycarbonate, Mounting Surface, Width 6 1/2 in, Depth 5 3/4 in, Height 8 1/2 in, For Use With Fire Strobes, Operating Temp. -40 Degrees to 250 Degrees F, Standards cUL, UL, Includes Mounting Hardware