This is a perfect package of a high power microscope with a 25 piece prepared slide collection for students to learn science. It comes with full optical glass elements metal framework 360 degree rotatable monocular head coarse and fine focusing and LED illumination. It offers five magnification settings 40x 100x 250x 400x and 1000x. The LED illumination system uses either an outlet (adapter included) or three AA batteries (or re-chargeable batteries). The 25-piece slide set includes assorted specimens of plants insects and animal tissues. This is an ideal microscopy package for home school or for students from elementary to high school. It is also an excellent instrument for hobbyists. Brand: AmScope Model: M150C-PS25 Color: White/ black Magnification: 40x 100x 250x 400x and 1000x Objective diameter: 4x 10x 40x Eye relief: Accurate alignment ensuring a fatigue-free long time viewing Lens coating: Fully coated optical system Requires batteries: Yes Body material: Metal/ alloy Weight: 5.25 pounds Dimensions: 7 inches high x 10 inches wide x 15 inches deep