This microscope with a digital imager (digital camera) is designed for students to learn science offering three magnification settings 40x 100x and 400x. It comes with a 640x480 pixel USB2.0 imager full optical glass elements all metal framework 360 degree and rotatable monocular head coarse fine focus and the LED illumination system that uses either wall-power (adapter included) or three AA batteries (or re-chargeable batteries). The camera can replace the microscope eyepiece so you can view comfortably on your computer screen. It is an ideal microscope for home school uses or for students from elementary to high school. It is also an excellent instrument for hobbyists. Brand: AmScope Model: M150-E 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