The ADF-650 is a 50-page automatic document feeder designed for the heavier demands of the corporate office. It is an essential accessory for hands-free scanning, archiving, and document management. Installation is easy and fits on top of the scanner in place of the scanner lid. No external power is required, and the ADF-650 plugs into the accessory port on the back of the scanner - and you"re ready to go! The ADF-650 is compatible with the ScanMaker 6800.