Type :Flatbed Scanner Optical resolution : 2400 x 2400dpi1 Selectable resolution : 25 - 19200dpi2 Interface : USB2.0 High-Speed Mini-B Maximum Document Size : A4 / Letter (216 x 297mm) EZ-Scan Buttons : 4 buttons (PDF, AUTOSCAN, COPY, SEND) Scanning speed : (colour) (Reflective) 14.8msec/line (2400 dpi) 6.6msec/line (1200 dpi) 3.8msec/line (600 dpi) 2.2msec/line (300 dpi)3 Supported Operating Systems : Windows 10、Windows 8.1、Windows 7 SP189 Operation can only be guaranteed on a PC with pre-installed Windows 7 or later. OS X 10.11.6、macOS 10.12〜macOS 10.13