This is a perfect package of a high power microscope for students to learn science. It comes with full optical glass elements, metal framework, 360 degree rotatable monocular head, coarse & fine focusing, and LED illumination. It offers five magnification settings, 40X, 100X, 250X, 400X and 1000X. The LED illumination system uses either an outlet (adapter included) or three AA batteries (or re-chargeable batteries). This