Document scanner feeder scanner duplex ultrasonic scan technology ccd scan format a4 supported document size 220 x 356 mm scan resolution 600 dpi interface usb 20 max scan speed 40 pagesmin automatic document feed 100 sheets document feeder automatic colour depth 48 bit functions duplex scanning scan to pdf controls scan buttons compatible operating systems windows 7 windows vista windows xp windows 2000 windows 81 windows 8 windows 10 colour