Chime Strobe, Finish White, Flush or Surface Mounting, Alarm Current 154 to 383mA FWR, 99 to 277mA DC, Peak Output (dBA) 78.6 dBA, Flash (Candela) 15/30/75/110 cd, Depth (In.) 13/16 in, Height (In.) 4 1/2 in, Length (In.) 2 3/4 in, Width (In.) 2 3/4 in, Ambient Temp. Limits (F) 32 Degrees to 120 Degrees F, Humidity Range ( Percent RH) 93 Percent RH, Voltage 24V DC, FWR, Standards CSFM, UL, ULC