Vivitar 40 Piece Microscope Set 300x, 600x and 1200x Magnifications Built-in light for direct illumination (uses 2 AA batteries, not included) Reflecting mirror for natural ilumination Shrimp Hatchery for Grow and Observe your own shrimp, Specimen Slicer for Create your own slides with items from around your home. Promotionally priced 40-piece magnfier set. 3 Magnifications;300x, 600x, and up to an enormous 1200x power. 20 pieces- Includes 5 prepared, 7 blank glass slides, interchangeable eyepieces, beakers, dye and hard shell carry case. Large easy-turn rotary focusing knob and high-quality Vivitar optics. Educational, fun at the same tim and high-quality. Great for science projects, school science lab and exploration.