Epson EXPRESSION 1640XL SCANNER, 310 x 437 mm, 1600 x 3200 DPI, TWAIN, 21 kg, EPSON Twain driver for PC & Mac EPSON Twain Pro Network for Windows & Mac (Scan server software..., Windows 95, 98, NT4.0 and Windows 2000: Pentium processor or greater, 32MB of RAM, USB (Windows... Epson EXPRESSION 1640XL SCANNER. Maximum scan size: 310 x 437 mm, Optical scanning resolution: 1600 x 3200 DPI. Scan drivers: TWAIN. Weight: 21 kg. Bundled software: EPSON Twain driver for PC & Mac EPSON Twain Pro Network for Windows & Mac (Scan server software.... Minimum system requirements: Windows 95, 98, NT4.0 and Windows 2000: Pentium processor or greater, 32MB of RAM, USB (Windows..., Compatible operating systems: Windows 95, 98, NT4.0 and Windows 2000 or Macintosh PowerPC/iMAC/G3/G4