This is a perfect microscope for students to learn science. It comes with full optical glass elements metal framework a 360 degree rotatable monocular head coarse and fine focusing with an LED illumination system that uses either an outlet (adaptor included) or three AA batteries. It offers three magnification settings. Brand: AmScope Model: M158 Color: White/ black Magnification: 40x 100x 400x 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: 4.85 pounds Dimensions: 7 inches high x 10 inches wide x 15 inches deep