Document scanner feeder scanner scan technology cis scan format a4 supported document size 216 x 965 mm scan resolution 600 dpi interface usb 20 max scan speed 20 pagesmin automatic document feed 50 sheets document feeder automatic colour depth 24 bit scan documents documents light source led functions duplex scanning compatible operating systems windows xp windows vista windows 7 windows 8 windows 81 windows 10 power supply ac adapter power