Plustek OpticSlim 550. Maximum scan size: 216 x 150 mm, Scanner type: Flatbed, Optical scanning resolution: 600 x 600 DPI. Standard interfaces: USB 2. Weight: 1200 g. Certification: CE, FCC. Minimum system requirements: CD-ROM, USB Port, 64 MB RAM, 300 MB free HDD space, High Color graphic card, Compatible operating systems: Microsoft Windows XP/2000/Vista