This biological microscope comes with contemporary design and almost all the advanced features a microscope has: 3-D double layer mechanical stage coaxial coarse & fine focusing brightness-adjustable illumination system high magnification powers and etc. With four objectives this microscope offers eight levels of magnification: 40X 64X 100X 160X 400X 640X 100X & 1600X. It is a wonderful instrument for students to learn sciences. It is also a perfect family or home school microscope. Features : Fully Coated Optical System with High Resolution Magnifications: 40X 64X 100X 160X 400X 640X 100X & 1600X 360 Degree Rotatable Monocular Head 3-D Double Layer Mechanical Stage Coaxial Coarse & Fine Focusing Abbe Condenser with Iris Diaphragm Blue Filter and Rack & Pinion Adjustment Control Built-in Illumination System with Adjustable Brightness Excellent 5 Year Factory Warranty. Specifications : Nosepiece: Triple Head: monocular head inclined at 45 degree Wide-Field Eyepiece: WF10X and WF16X Achromatic Objectives: 4X 10X 40X (spring) 100X (oil spring) Stage Dimensions: 5-0 x 4-1/2 (125x115mm) Stage Traveling Range: 2-3/4 x 0-3/4 (70x20mm) Focusing Range: 0-13/32 (10mm) Abbe Condenser: NA=1.2 with rack and pinion focusing control Illumination: incandescent lamp 110V/20W Accessories: a 110V/20W spare tungsten bulb a dust cover spare fuse Packing List : One Monocular Microscope with 3D Mechanical Stage Four Achromatic DIN objectives 4X 10X 40X 100X One Widefield WF10X Eyepiece One Widefield WF16X Eyepiece One Pair of Clips One 110V/20W Spare Tungsten Bulb One Dust Cover User s Manual Shipping Weight: 8 lbs