The Ultimate educational tool is even more versatile on a new base with a rechargeable battery powered LED light source. The detachable AC power cord can be used to power the light or recharge the battery for portable use in the field. Battery lasts for hours and can be recharged hundreds of times for years of valuable scientific research. New improved LED light source now allows you to control the brightness of the light for the best image. Features: 10X Widefield eyepiece with pointer 3 Achromatic objective lenses: 4X 10X & 40X Power Magnification from 40X to 400X Adjustable intensity LED illumination Built in rechargeable battery and detachable AC power cord Includes five prepared slides and Vinyl dust cover