The HP 3-bin Mailbox stacks up to 500 pages in one bin and up to 100 pages each in two additional bins, for a total maximum output capacity of 700 pages. This multifaceted accessory also comes with three intelligent operating modes for improved workflow and offers convenient access to print, copy, and fax jobs. Mailbox mode assigns bins to users or groups, Stacker mode combines the bins to act as a stacker, and Function-Separator mode separates print, copy, and fax jobs.