Slide viewer with 2x magnifying lens for framed slides, 5 x 5 cm (2 x 2 in.), and uncut film strips in protective sleeves.On/off switch.Battery operation: 2 x 1.5 V C-size (supplied without batteries)Lamp: 2.5 V, .3 amp., E10, sphericalLens: 76 x 76 mm (3 x 3 in.)Dimensions (WxHxD): 80 x 160 x 170 mm (3.1 x 6.3 x 6.7 in.)