The micro slide viewer (Bio Viewer) is a cost effective basic alternative to standard laboratory microscopes and gives the students a good quality image. No power requirement and very light weight. Robustly made. Excellent for an introduction to microscopy. Allows the user to view a series of Micro Slides.Magnification 50xAvailable Slide Sets: Cells of Your Body (B8R06960) Cells of Plants (B8R06961) Monocots & Dicots (B8R06962).