Expands input capacity up to maximum of 1,100 sheets (also requires optional 250-sheet paper tray). Accepts multiple paper types--just load them into different trays. Handles paper sizes from 5.8 by 8.2 up to 11 by 17 inches. Unit is easy and convenient to install. Permits refilling paper less often. Compatible with LaserJet 5100 printer (already included with 5100 and 5100dtn).