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