The digital USB microscope is designed to assist you in your scientific studies and observations. For convenience you can choose to use it handheld, or to free your hands place it on the included stand outfitted with an articulating arm that can be arranged to point it precisely where you need it to view your specimen or sample.Features:Name : USB microscopeMagnification range: 500XAdjustable illumination: 8 built-in LED diodesVGA : 640 x 480Operation system: WIN XP / VISTA / WIN 7Power supply: USB port (5V DC)Frame rat: 30f/sUse : Educational purposes, hair examination, skin examination, plants testing, children's exploration platten, textile inspection, jewelry inspection, collections/coin inspection, printing inspection, antiquesThank you for working with us. We sell products in good faith. If you have any questions, please contact us in time. We will solve it for you within 24 hours.