Document scanner flat bed scanner feeder scanner scan technology ccd scan format a4 supported document size 216 x 4064 mm scan resolution 600 dpi interface usb 20 max scan speed 60 pagesmin automatic document feed 250 sheets document feeder automatic colour depth 48 bit opening angle 90 backwards scan documents documents light source led controls touch screen compatible operating systems windows 8 windows 7 windows vista windows xp windows 81