Duct Smoke Detector Photoelectric Finish Clear Plastic Surface Mounting Alarm Current 35 mA Peak Output (dBA) - Flash (Candela) - Standby Current (uA) 25 uA Depth (In.) 1 7/8 in Height (In.) 5 7/16 in Length (In.) 14 1/2 in Width (In.) - Duct Opening - Duct Width (Ft.) - Ambient Temp Limits (F) -20 Degrees to 158 Degrees F Coverage (Square-Ft.) - Air Velocity (FPM) 100 to 4000 fpm Alarm Aux. Contact @ 250V - Alarm Aux. Contact @ 30VDC - Alarm State (mA) -