Thank you for viewing. The appendix for the DIME September/October combined issue is a 90x smartphone microscope. You can enjoy the microscopic world of fingerprints, pores, scalp, banknotes, leaf veins, and more! Great for summer science projects. It comes with two lights, LED and UV-LED, convenient for observation. *Uses three LR44 button batteries. Button batteries are sold separately. Brand new, unused. We look forward to your purchase, understanding that this is an appendix item.