The Barska Compound Student Microscope 640xx is an excellent tool for educational applications and comes with everything educators and students need to start exploring the world of microscopes. The user-friendly features of this Compound Microscope give young scientists a hands-on learning experience while high quality optics deliver impressive detail. A rotating nose piece allows the user to switch between the 4x, 10x, and 40x objective lenses. The Barska Compound Student Microscope comes with both prepared and blank slides, allowing students and enthusiasts the opportunity to readily view prepared specimens, or create their own samples.