This is a great microscope that will serve you far beyond student use. I used this microscope to perform the US$1 million damaged diamond claim in London a few years ago. Can be operated on AA battery and has the new transformer to operate on 110v and 220v with proper plug adapter. This scope is a turret design with 20 x and 40x magnification. Three different types of lighting: Overhead, darkfield and brightfield. A great microscope for the price that will last you a lifetime if properly maintained. The use of this scope is covered in the ISG Gemology Tools and Techniques course. It is for sale for ISG Students and Graduates only. Does not come with a manual as we use the course notes to teach how to use.