The xerox documate 3115 has all the features you expect in a powerful desktop scanner such as a 20 page automatic document feeder adf 30 images per minute duplex scanning speed and visioneer onetouch with kofax vrs technology then at the push of a button the documate 3115 ejects from its docking station to become a full function mobile scanner when undocked the documate 3115 can be powered by a second usb cable instead of an ac adapter providing a true mobile experience for users on the