Hazardous Location Horn Diode Polarized Finish Red Corrosion-Resistant Epoxy Alarm Current .16A Peak Output (dBA) 97 dBA 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