Plustek OpticFilm 7500i SE. Maximum scan size: 36.8 x 25.4 mm, Scanner type: Sheet-fed, Optical scanning resolution: 7200 x 7200 DPI. Standard interfaces: USB 2.0. Weight: 1.6 kg. Minimum system requirements: CD-ROM USB, Minimum hard disk space: 500 MB, Minimum RAM: 512 MB