This cordless LED monocular biological microscope is designed for both indoor and outdoor applications. With the versatility of a rechargeable battery operated system and an adjustable rheostat light intensity control you can use this model as either a portable field-use scope on battery power or plug it into a wall outlet for traditional classroom use with the AC adapter and charger. This microscope offers sharp clear images cool illumination six magnification levels and freedom from cords. It comes with a 45 degree inclined 360 degree rotatable monocular head coarse and fine focusing and an intensity-adjustable LED illuminating system. Brand: AmScope Model: M200B-LED Color: White/ black Magnification: 40x 80x 100x 200x 400x and 800x Objective diameter: 4x 10x 40x (spring) Eye relief: Accurate alignment ensuring a fatigue-free long time viewing Lens coating: Fully coated optical system Requires batteries: No (includes 3 batteries for cordless use) Body material: Metal/ alloy Weight: 7.1 pounds Dimensions: 7 inches high x 12 inches wide x 18 inches deep