Media Sensors:Full width, moveable reflective/black mark sensor; multi-position transmissive/gap sensor Resolution:203 dpi/8 dots per mm, 300 dpi/12 dots per mm (optional) Memory:512 MB Flash; 256MB SDRAM, 64 MB user available non-volatile memory, 8 MB user available SDRAM Interface:USB 2.0, USB Host Maximum Print Speed:6 in./152 mm per second (203 dpi), 4 in./102 mm per second (300 dpi) Maximum Print Width:4.09 in./104 mm for 203 dpi, 4.27 in./108 mm for 300 dpi, Cartridge: 4.09 in./104 mm for 203 and 300 dpi