Sheet-feed , automatic document feeder ( ADF) 50 pages , two slide scanning with ADF. Scan Speed Up to Up to 35 ppm/70 ipm (300 dpi) , duty cycle: Up to 3,500 pages per day (ADF) . Ram 512MB, Scan resolution : Up to 600 dpi (color and mono, Sheet-feed) , Bit depth : 24-bits external 48-bits internal ,  Levels of grayscale : 256 , Control panel : Scan button, Cancel button, Power button with a LED and a LED for Error indication . Connectivity : USB 2.0 and USB 3.0 (SuperSpeed)  & option USB 2.0 port for Wi-Fi accessory .