Document scanner feeder scanner scan technology cis scan format a4 supported document size 216 x 1524 mm scan resolution 600 dpi interface usb 20 position of connectivity ports 1x usb rear max scan speed 20 pagesmin automatic document feed 20 sheets document feeder automatic colour depth 24 bit functions automatic colour matching slant correction auto cropping image rotation automatic colour dropout dual stream scanning image merge image edge fill sk