Practical zoom microscope with many possible applications from stamp, coin and currency collecting to school, studies, and leisure. Outstanding clarity of image and resolution. Continuous adjustment between 20x and 40x magnification. Powerful LED enables illumination of the research object (comes with 3x LR44 batteries). Includes object holder. Dimensions: 4 x 2 1/8 x 1 1/4″ (102 x 55 x 30 mm).