DS-640 Compact Mobile Document Scanner, 600 dpi Optical Resolution, 1-Sheet Auto Document FeederThe Brother DS 640 mobile scanner is ideally suited for on the go small office home office professionals with its compact, mobile design and simple workflow applications. The compact size and portability of the DS 640 combined with its fast scan speeds and image optimization features, make it a perfect fit to be used on the road or to be used in the home or small office, providing compatibility with the way you work. The DS 640 offers plug and play