Document scanner flat bed scanner a3 scanner scan technologies cis singlepass scan format a3 supported document size 297 x 432 mm scan resolution 1 200 dpi interface usb 20 position of connectivity ports 1x usb rear max scan speed 4 pagesmin colour depth 48 bit opening angle 90 backwards light source led number of keys 5 compatible operating systems windows 8 windows 7 windows vista windows xp windows 81 windows 81 windows 8 windows 8 windows