Designed for middle school students, this hand-held microscope is well-suited for outdoor studies. It can be used at 50x without the compounding lens, or as a 100x - 200x zoom microscope with the lens. Students can use the mirror for illumination, or aim the microscope directly at a light source. You can even convert this instrument to a microprojector. Overall height is 17 cm (10.5 cm without the compounding lens). Includes: instructions.