The 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. 24-Bit color, 8-Bit gray scale, 1-Bit monochrome. 16 ppm. Micro USB 3.0. Compact and lightweight; Bundled software lets you do more; Compatible with the way you work; On the go scanning; Time-saving, fast scan speeds. 1.99 x 11.85 x 1.45 in. Sold by each.