Plustek OpticSlim 500. Maximum scan size: 216 x 140 mm, Scanner type: Flatbed, Optical scanning resolution: 600 x 1200 DPI. Weight: 950 g. Power consumption (typical): 2.5 W. Certification: CE, FCC, UL/cUL, TUV. Minimum system requirements: CD-ROM, USB Port, 64 MB RAM, 600 MB free HDD space, High Color graphic card, Compatible operating systems: Microsoft Windows XP, 2000, Vista