Duct Smoke Detector Controller, Surface Mounting, Alarm Current 124.3mA @ 24Vdc; 74mA @ 120Vac; 32mA @ 220Vac, Standby Current (uA) 77.9mA @ 24Vdc; 79mA @ 120Vac; 34.5mA @ 220Vac, Depth (In.) 1 7/8 in, Height (In.) 5 7/16 in, Length (In.) 5 13/16 in, Ambient Temp. Limits (F) -4 Degrees to 158 Degrees F, Alarm Aux. Contact @ 250V 10 A, Alarm Aux. Contact @ 30VDC 10 A, Voltage 120V AC, 220V AC, 24V AC/24V DC, Standards CSFM, UL, ULC, For Use With SD-SJ