A quality Hama product which is still popular for photographers who use slide films or when checking your old collection of images etc. Accepts 35mm mounted slides (also called transparencies) with backlight to enlarges slides, allowing them to be viewed quickly and easily. 35mm mounted slides are around 5x5cm in size. The slide-mounts can be made of cardboard or plastic. Slides can be locked down for longer viewing times. Large back lighted viewing area of 48x54mm. Backlight is provided by a replaceable bulb which is powered by 2x AA batteries (batteries are not included but easily available). Clear optical quality lens for great detail. Unit is both portable and lightweight, easy to travel with and requires no mains power. Great for quickly viewing your old 35mm slides like Kodachrome, Ektachrome Fujichrome, Agfachrome etc.