Horn Strobe, Two-Wire, Finish Red, Wall Mounting, Alarm Current 79ma-218ma (DC Max), Peak Output (dBA) 88, Flash (Candela) 15-115 Selectable, Depth (In.) 2-1/2, Height (In.) 5-5/8, Length (In.) 4-3/4, Width (In.) 4-3/4, Ambient Temp. Limits (F) 32 to 120 Degrees , Humidity Range ( Percent RH) 10-93, Voltage 12-24V, Includes Universal Mounting Plate, For Use With Fire Alarm Panel Fire Alarm Output DevicesSignals are hardwired from a control panel (sold separately).UL and C-UL Listed, CSFM Approved. Edwards fire alarm and horn strobes are UL 1971 listed for the hearing impaired. Ceiling speaker 6VEZ2 is UL listed 1480 for use as a fire alarm signalling device.Audible and Visual SignalsG3854, 5KDF9, and 5KDG0 for outdoor use when used with Weatherproof Back Box G3855.