Hazardous Location Horn Diode Polarized, Finish Red Corrosion- Epoxy, Alarm Current .16A, Peak Output (dBA) 97, Depth (In.) 4 3/16 in, Height (In.) 6 1/2 in, Length (In.) -, Width (In.) 7 5/16 in, Voltage 20 to 24V DC, Standards UL Class 1 Groups B C D, Class 2 Groups E F G, Class 3