This biological microscope has 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 and so on. With 10X and 16X eyepieces, it offers six levels of magnification: 40X-64X-100X-160X-400X-640X. 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 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 3 Year Factory Warranty Specifications: Nosepiece: Triple Head: monocular head inclined at 45 degree Wide-Field Eyepiece: WF10X & WF16X Achromatic Objectives: 4X, 10X, 40X (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: 1W LED Accessories: a 110V/20W spare tungsten bulb, a dust cover, spare fuse Packing List : One Monocular Microscope with 3D Mechanical Stage Three Achromatic DIN objectives, 4X, 10X, 40X One Widefield WF10X Eyepiece One Widefield WF16X Eyepiece One Pair of Clips Power Adapter One Dust Cover User's Manual Download Shipping Weight: 8 lbs For ages 10+