MT-31 is an Advanced Student level Compound Brightfield Biological Compound LED Microscope with built in USB 2.0 Digital Camera is our best buy for a student microscope that is affordable and portable! This dynamic series also comes with a built in 3.2MP 1/2 chip CMOS USB 2.0.that you can easily connect to your PC. A new optical standard of precision optics is found in the MT-31 advanced student microscopes. Rechargeable batteries, cordless feature enables use of the instrument without an outlet. These proven, durable microscopes will withstand the constant scratching, battering, student wear and tear a student microscope endures from day to day use. The rugged cast aluminum base is designed with stability in mind, but compact in design to fit most cabinets. The objective turret nosepiece is in reverse position to permit easier changing and positioning of specimen slides and to protect the objective lenses. The LED illumination with intensity control provides optimum image brightness with all objectives in place. LED offers no heat, providing no external stress on the sample on the stage or quickly evaporating an alcohol solution. Ergonomic Hand Grip for portability and ease of storage. The magnification of this Binocular Compound Microscope with integrated digital camera ranges from 40x, 100x, 400x and 1000x. Ideal for biological use, this microscope is used by K-12, Middle School and High School Laboratory. The MT-31 microscope requires that the specimen be mounted on a slide and are held in place and manipulated by the built in mechanical stage with 120 x 120 mm footprint with two object clamps.These student microscopes are built to last, year after year. Just perfect for grade schools and high schools and magnet schools!