AmScope 40X-1000X Metal Frame Glass Optics Digital Student Microscope + 2MP USB Imager 360&deg; rotatable monocular head w/ optical glass lenses Five Levels of Magnification: 40X, 100X, 250X, 400X and 1000X Single lens condenser with 6-hole disc diaphragm LED illumination via outlet and/or batteries Sturdy all-metal framework