Document scanner feeder scanner scan technology cis scan format a4 supported document size 216 x 356 mm scan resolution 600 dpi interface usb 20 max scan speed 65 pagesmin automatic document feed 80 sheets document feeder automatic colour depth 48 bit light source led tri colour rgb functions duplex scanning controls scan buttons compatible operating systems windows 8 windows 7 windows vista windows xp windows server 2008 windows server 2012 win