Document scanner feeder scanner scan technologies cmos cis scan format a4 supported document size 216 x 355 mm scan resolution 600 dpi interface usb 30 position of connectivity ports 1x usb rear max scan speed 40 pagesmin automatic document feed 50 sheets weight of paper 34 413 gm document feeder automatic light source led functions ultrasonic double feed detection dual stream scanning controls scan buttons compatible operating systems windows