Document scanner feeder scanner duplex scan technology cis scan format legal supported document size 216 x 356 mm scan resolution 600 dpi interface usb 20 position of connectivity ports 1x usb rear max scan speed 25 pagesmin automatic document feed 50 sheets document feeder automatic colour depth 48 bit functions duplex scanning scan to pdf controls scan buttons compatible operating systems windows 7 windows vista windows xp windows 2000 windows