Cokin Infiniclear Digital USB Microscope

Magnification from 60x to 250x (based on a 17″ monitor)
Variable illumination of subject, via 4 white LEDs
USB powered, with standard USB and micro-USB adapter cables
Built-in, adjustable polarising filter
Includes red, green and blue coloured filters for increased contrast
USB2 connection to PC, Laptop or Android Smartphone/Tablet