For framed slides, 5 x 5 cm (2 x 2 in.), and film strips. 2-fold 2x magnification. Lens diameter 18 mm (.7 in.)
Dimensions (WxHxD): approx. 55 x 55 x 60 mm (2.2 x 2.2 x 2.4 in.)
Simply insert slide and hold up to bright light source. No batteries required.