Horn Strobe, Marked Fire, Finish Unfinished, Wall or Ceiling Mounting, Alarm Current 43 to 222mA DC, 60 to 257mA FWR, Peak Output (dBA) 88, Flash (Candela) 15/30/75/110/135/185, Depth (In.) 3-5/16, Height (In.) 6-5/8, Length (In.) 6-5/8, Width (In.) 6-5/8, Ambient Temp. Limits (F) 32 to 120 Degrees , Humidity Range ( Percent RH) 10 to 93, Number Required 0, Voltage 12/24VDC, Standards NFPA, Includes Mounting Plate