Optic Explorer Microscope Quick Switch 150x/300x/600 Optic Explorer Quick Switch Microscope. A good beginner microscope for young scientists. Assorter colors - Red & Blue. Will receive only 1 set. Quick switch feature to change view of slides from eyepiece to the larger view screen. Features three Magnifications;150x, 300x & 600x Includes: 4 Slides, Slide covers, Tweezer, Pipette, 2 collection vials Requires 3 AA Batteries (not included)