Mustek ScanExpress S40 Plus. Maximum scan size: 216 x 355 mm, Scanner type: sheet-fed, Optical scanning resolution: 600 x 600 DPI. Standard interfaces: USB 2.0. Width: 60 mm, Depth: 295 mm, Height: 40 mm. Power consumption (typical): 0.7 W, Power consumption (standby): 0.3 W, Power supply type: AC/USB. Minimum system requirements: Pentium III 300 CPU 256MB RAM CD-ROM USB Port