Duct Smoke Detector, Smoke Detector, Finish Unfinished, Duct Mounting, Alarm Current 135mA RMS @ 24V AC, 35mA RMS @ 120V AC, 65mA @ 24V DC, Depth (In.) 2 1/4 in, Height (In.) 4 3/4 in, Length (In.) 14 1/4 in, Tube Length (Ft.) 1 ft, Width (In.) 2 1/4...