This is a silver-colored metal slide viewer. The slide viewer has a black cord coming out of the back of it. The cord has a 2 pronged plug at the end. The back of the slide viewer has the text "No. 210 Slide Viewer/ HO-120 V A.C. OR D.C. 60 C./ Max Lamp 7.5 watts/ Ogan Elec. Spec. Co./ Chicago, Ill." etched into it. The slide viewer measures 6" (h) x 4" (w) x 6" (d).