This high-power LED monocular compound microscope is designed for both indoor and outdoor applications. With the versatility of a rechargeable battery-operated system and an adjustable rheostat light-intensity control, you can use this model as either a portable field-use microscope on battery power, or plug it into a wall outlet for traditional classroom use. A mechanical caliper is included to replace the standard stage-clips, allowing precision control over sample position. This microscope offers sharp clear images, cool illumination, and four magnification levels (40X, 100X, 400X & 1000X). It comes with a 45? inclined 360? rotatable monocular head, coarse & fine focusing, intensity-adjustable LED illuminating system, three rechargeable AA batteries and an AC adapter/recharger. This durable and reliable microscope is a perfect instrument for teachers, students and hobbyists to learn science.