Yashica Auto Document Feeder ADF-400 This document scanner supports USB 2.0 connection and scans up to A4 size documents. It also supports duplex scanning, and by using the included sheet, it can perform automatic composite scanning of A3 size documents. The sensor resolution is 600 x 600 dpi. Scanning speed is approximately 25 pages/minute for monochrome and approximately 8 pages/minute for color. Included items: All items shown in the photos.