Type: Flatbed Scanner Scanning element: CIS Light source: 3-color (RGB) LED Optical resolution: 2400 x 2400dpi Selectable resolution: 25 – 19200dpi Interface: USB2.0 High-Speed Mini-B Scanning gradation (colour): 48 bit input -> 48/24 bit output Scanning gradation (greyscale): 16 bit input -> 8 bit output Maximum Document Size: A4 / Letter (216 x 297mm) EZ-Scan Buttons: 4 buttons (PDF, AUTOSCAN, COPY, SEND)