When both an Output Expander and High Capacity Output Expander are installed, the Output Expander must be installed above the High Capacity Output Expander.<br><br>Up to 3 Output Expanders may be supported at a time. Any combination of Output Expander and 4-Bin Mailbox for up to a total of 3 devices may be configured.<br><br>This unit supports up to 500 sheets of paper (20 lb., 75 gsm). Envelopes, transparencies, card stock and labels are also supported with this unit.<br><br>The Output Expander supports bin 'full' sensing.