The M4097D scanner is based on the fi-4750L, but adds additional speed and ADF capacity. The fi-4750L can scan in monochrome or grayscale at speeds up to 55 pages per minute (ppm) simplex and 100 images per minute (ipm) duplex. The fi-4750L features a 250-page automatic document feeder that can be continuously fed for maximum throughput. The scanner offers standard image processing including error diffusion, dynamic thresholding and image emphasis.