Stopper Dome for Horn/Speaker/Strobe Enclosed Back Indoor Outdoor Color Clear Material Polycarbonate Mounting Surface Width 9 3/8 in Depth 4 1/4 in Height 8 1/2 in For Use With Horns Speakers Strobes Operating Temp -40 Degrees to 250 Degrees F Standards UL/cUL Listed ADA Compliant Features Polycarbonate Cover Helps Protect Horn/Speaker/Strobe Unit Against Vandalism and Accidental Damage Slotted Cover Allows Horn/Speaker to Be Heard