Functions
All-in-one functions
Print, copy, scan to USB, digital send, fax, and optional advanced paper handling
Multitasking Supported:Yes
Printing specifications
Print speed, black (normal quality mode):Up to 55 ppm
Print speed footnote:Measured using ISO/IEC 24734, excludes first set of test documents. For more information see http://www.hp.com/go/printerclaims. Exact speed varies depending on the system configuration, software application, driver, and document complexity.
Page yield footnote:Declared yield value for black cartridge in accordance with ISO/IEC 19752. Actual yields vary considerably based on images printed and other factors. For more information, visit http://www.hp.com/go/learnaboutsupplies
First page out (black).As fast as 9.5 sec
Monthly duty cycle:Up to 250,000 pages
Footnote for duty cycle:Duty cycle is defined as the maximum number of pages per month of imaged output. This value provides a comparison of product robustness in relation to other HP LaserJet or HP Color LaserJet devices, and enables appropriate deployment of printers and MFPs to satisfy the demands of connected individuals or groups.
Recommended monthly print volume:5000 to 20,000 pages
Footnote for recommended monthly print volume:HP recommends that the number of printed pages per month be within the stated range for optimum device performance, based on factors including supplies replacement intervals and device life over an extended warranty period.
Print technology:Laser
Print resolution, black
Up to 1200 x 1200 dpi

Paper Handling
Paper handling optional,output:Optional 900-sheet, 3-bin stapling mailbox
Paper handling standard,input:100-sheet multipurpose tray 1, 500-sheet tray 2, 1 x 500 sheet feeder with cabinet, 50-sheet automatic document feeder
Paper handling standard,output:500-sheet output bin
Envelope capacity:Up to 10 envelopes
Envelope feeder:Optional with the purchase of 75-sheet envelope feeder
Duplex printing (printing on both sides of paper):Automatic (standard)
Document finishing:Sheetfed
Media sizes, standard:Tray 1: Letter, legal, 8.5 x 13 in, statement, executive, envelopes [No. 9, No. 10, Monarch (7 3/4)], 3 x 5 in, 4 x 6 in; Tray 2, 3, 4, 5: letter, legal, 8.5 x 13 in, executive
Media sizes, custom:Tray 1: 3 x 5 to 8.5 x 14 in; Tray 2-3: 5.8 x 8.3 to 8.5 x 14 in
Media types:Paper (plain, light, bond, recycled, cardstock), transparency, labels, letterhead, envelope, preprinted, prepuched, colored, rough
Media weight:Tray 1: 16 to 53 lb bond (plain), 16 to 24 lb (envelopes); Tray 2-3: 16 to 32 lb bond (plain)
Media weight:Tray 1: 60 to 200 g/m²; Tray 2-3: 60 to 120 g/m²
Weight:166.4 lb

Additional Specifications
Processor speed:800 MHz
Memory, standard:1280 MB
Memory, maximum:1280 MB
Print languages, standard:HP PCL 6, HP PCL 5c (HP PCL 5c driver available from the Web only), HP Postscript level 3 emulation, native PDF printing (v 1.4)

Scanner specifications
Scanner type:Flatbed, ADF
Scan resolution, optical:Up to 600 dpi
Bit depth:30-bit
Scan size, maximum (flatbed):8.5 x 14 in
Scan size, maximum (ADF):8.5 x 14 in
Scan speed (default):Up to 57 ppm
Scanner features:Yes
Automatic paper sensor:No

Digital sending specifications
Digital sending features:Scan to E-mail; Save-to-Network Folder; Save-to-USB drive; Send to FTP; Send to LAN Fax; Send to Internet Fax
Supported file formats:Digital Send: PDF, JPEG, TIFF, MTIFF, XPS, PDF/A; Scan to walk-up USB: PDF, JPEG, TIFF, MTIFF, XPS, PDF/A; Print from walk-up USB: PDF, PS, Print Ready files (.prn, .pcl, .cht)

Copier specifications
Copy speed black (normal, letter):Up to 55 cpm
Copy speed color (normal, letter):Up to 55 cpm
Copy resolution, black:Up to 600 x 600 dpi (flatbed), up to 600 x 300 dpi (ADF)
Copy resolution, color:Up to 600 x 600 dpi (flatbed), up to 600 x 300 dpi (ADF)
Copy reduce/enlarge settings:25 to 400%
Maximum number of copies:Up to 9999 copies

Fax specifications
Faxing:Yes
Fax transmission speed (seconds per page):6 sec per page
Fax note:Based on standard ITU-T test image #1 at standard resolution. More complicated pages or higher resolution will take longer and use more memory.
Fax resolution, black (dots per inch):Up to 300 x 300 dpi (400 x 400 dpi for received faxes only)
Speed dials, maximum number:Up to 100 numbers (each with 100 destinations)
Auto redial:Yes
Fax delayed sending:No
Fax broadcast:100
Junk fax barrier:Yes
Polling:Yes (poll to receive only)
Remote retrieval:No
Fax forwarding:Yes

Connectivity
HP ePrint:Yes (firmware upgrade may be required to enable)
Mobile printing capability:HP ePrint
(May require a firmware upgrade to be HP ePrint compatible, download at http://www.hp.com/go/support)
Connectivity, standard:1 Hi-Speed USB 2.0 Host port; 1 Hi-Speed USB 2.0 Device port; 1 Gigabit Ethernet 10/100/1000Base-TX network port; 1 open EIO slot; 1 Foreign Interface port; 1 Hardware Integration Pocket; 3 Internal USB Host ports
Connectivity, optional:HP Jetdirect 635n IPv6/IPsec Print Server J7961G; HP Jetdirect 690n IPv6/IPsec 802.11g Wireless Print Server J8007G; HP Jetdirect ew2500 802.11b/g Wireless Print Server J8021A. For more information on HP networking solutions visit http://www.hp.com/go/jetdirect

Minimum system requirements
PC: Microsoft® Windows 7®, Windows Vista®, Windows® XP SP2 or higher, Windows® Server 2003, Windows® Server 2008; operating system compatible hardware system requirements, see http://www.microsoft.com system requirements; 200 MB available hard disk space
Macintosh: Mac OS X v 10.5 or higher; operating system compatible hardware system requirements, see: http://www.apple.com; 150 MB available hard disk space

Compatible operating systems:Microsoft® Windows® 7, Windows Vista®, Windows® XP (SP2 or higher), Windows® Server 2008 and 2008 R2 Edition (64-bit only), Windows® Server 2003; Mac OS X v 10.5 or higher; For latest support: Citrix and Windows® Terminal Services (see http://www.hp.com/go/upd); Novell (see http://www.novell.com/iprint for latest support); Linux (see http://www.hplip.net); UNIX (see http://www.hp.com/go/unix, http://www.hp.com/go/unixmodelscripts, and http://www.hp.com/go/jetdirectunix_software); SAP device types (see http://www.hp.com/go/sap/drivers and http://www.hp.com/go/sap/print)

Photo printing
Display:8.07" (20.5 cm) touchscreen Color Graphic Display (CGD)
Memory Card Compatibility:None

Dimensions and weight
Dimensions (W x D x H):32.48 x 27.95 x 43.90 in
Dimensions, max. (W x D x H):43.7 x 37.1 x 57.1 in (with trays fully extended)
Weight:166.4 lb
Package weight:218.9 lb

Power and operating requirements
Power supply:Input voltage 110 to 127 VAC (+/- 10%), 60 Hz (+/- 2 Hz), 12 A; 220 to 240 VAC (+/- 10%), 50 Hz (+/- 2 Hz), 6 A
Power consumption:960 watts (Printing), 1024 watts (Copying), 54 watts (Ready), 21.6 watts (Sleep), 0.15 watts (Off)
Power consumption footnote:Power requirements are based on the country/region where the printer is sold. Do not convert operating voltages. This will damage the printer and void the product warranty. Values subject to change. Power numbers are the highest average values measured using all standard voltages.
Acoustic power emissions:7.1 B(A)
Acoustic pressure emissions bystander (ready):57 dB(A)
Recommended operating temperature (Fahrenheit):59 to 80.6º F
Recommended Operating humidity range:30 to 70% RH
ENERGY STAR® Qualified:Yes

What's in the box:HP LaserJet Enterprise M4555f MFP (100-sheet multipurpose tray; 500-sheet input tray; HP Jetdirect Gigabit Ethernet embedded print server; HP High-Performance Secure Hard Disk); HP LaserJet Toner cartridge standard capacity; 1 x 500 paper feeder with cabinet; HP Analog fax accessory 500 (built-in); CD with software and documentation; Documentation (Hardware Install Guide, Support flyer, Wall poster); power cord; phone cord
Cable included?:No, please purchase USB cable separately
Software included:Windows print driver (HP PCL 6 discrete), SNP alerts, Mac print driver, Installation software on CD-ROM for Windows and Mac
Warranty:One year next day on-site warranty, one year free phone support, chat, and e-mail