Two light sources allow this microscope to magnify both slides and solid objects! View slides, coins, plants, stamps, insects, jewelry and more! You would need two instruments to view what this one does â€“ a basic biological scope to look at specimens on a slide (light shines up from under the slide and through the tissue) and a traditional stereo or dissecting microscope to view solid objects at lower power (light shines down onto the specimen being observed). Duo-Scope with dual lighting allows for both types of applications! Cordless battery( 3 AA ) power makes it portable for field study. CPSIA Approved. Features 10X eyepiece, 4X, 10X, 40X objectives, 40X, 100X & 400X magnification and real optical glass lenses. Includes 5 blank slides, 1 concavity slide, 4 prepared slides, 2 bottles of stain, forceps, plastic test tube and plastic petri dish.