This is the European version. Requires 220 Volt outlet. This is not for use in the USA. This microscope is of metal construction and built to last. Magnify objects from 40 to 400 times with three objectives - 4x, 10x, and 40x, and a widefield 10x eyepiece. The stage measures 90mm x 90mm with two spring clips to retain the slides. This microscope is a perfect solution for schools and families looking to introduce the concepts of microscopy to young students without the expense of a more advanced instrument. This microscope stands 292mm high. The base measures 152mm x 114mm. Specifications: Monocular head included at 45 degrees, 10X zoom wide focus eyepiece, objective lens at 4X, 10X, and 40X. Plain 90mm x 90mm stage with clips, single lens condenser with Disc diaphragm, coarse adjustment focusing. Powered by 220V/20W Incandescent lamp. Requires available standard electrical outlet.