AmScope 40X-1000X Glass Lens Metal Frame C&F LED Compound Microscope + Slide Kit & Book 360 degree rotatable monocular offers five magnifications 40X-1000X Metal framework; optical glass lenses; co-axial coarse and fine focusing; single lens condenser and disc diaphragm Cordless LED illumination uses either an outlet or 3AA batteries 10-piece slide kit includes five blank slides and five prepared The Book: "The World of The Microscope"