This is one of the best student USB microscope systems for about $100, in my opinion and I tried a half dozen. It consists of a Celestron 5 MP USB microscope ($80) and an Aven 26700-311 Digital Microscope Universal Stand ($42). The microscope comes with it own base, but the Aven was preferred because it has X-Y adjustability and backlighting. The power is 20X to 200X allows one to see most of the single cell microorganisms. The cost is $122. It comes with software and can can provide picture as large as 2592 x 1944 pixel. This microscope was used to examine the fast plant.