Document scanner feeder scanner a3 scanner duplex 32 mb ram scan technology cis scan format a3 supported document size 297 x 420 mm scan resolution 600 dpi interface usb 20 max scan speed 60 pagesmin automatic document feed 300 sheets document feeder automatic colour depth 24 bit scan documents documents light source led functions duplex scanning ultrasonic double feed detection power supply ac adapter colour gray internal memory 32 mb wid