Accessories and supplies 1 500-sheet feeder (Q5968A) 2 Duplexer (Q5969A) 3 Envelope feeder (Q2438B) 4 Stapler/stacker (Q5691A) 5 Memory DIMM 6 HP Jetdirect print server (EIO card) 8 Chapter 1 Product information ENWW 4 Output bin 5 Optional duplexer 6 On/off switch 7 Power connection 8 Interface ports 9 Formatter cover (p rovides access to the memory DIMM slot, hard disk, and analog-fax accessory)