Document scanner feeder scanner a3 scanner scan technology cis scan format a3 supported document size 307 x 2540 mm scan resolution 600 dpi interface usb 30 max scan speed 80 pagesmin automatic document feed 300 sheets document feeder automatic scan documents documents business cards plain paper functions duplex scanning ultrasonic double feed detection controls 3 scan buttons compatible operating systems windows 8 windows 7 windows vista windows x