All-in-one functions
Print, copy, scan to USB, digital send, fax, and advanced paper handling (stapling mailbox)
Multitasking Supported
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 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
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
Print resolution, black
Up to 1200 x 1200 dpi
8.07" (20.5 cm) touchscreen Color Graphic Display (CGD)
Paper Handling
Paper handling standard,input
100-sheet multipurpose tray 1, 500-sheet tray 2, 3 x 500-sheet feeder with stand, 50-sheet automatic document feeder
Paper handling standard,output
900-sheet, 3-bin stapling mailbox
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; Collation
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 2-5: 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 2-5: 16 to 32 lb bond (plain)
Media weight
Tray 1: 60 to 200 g/m²; Tray 2-5: 60 to 120 g/m²
192.9 lb
Additional Specifications
Processor speed
800 MHz
Memory, standard
1280 MB
Memory, maximum
1280 MB
Memory Card Compatibility
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
Scan size, maximum (flatbed)
8.5 x 14 in
Scan size, maximum (ADF)
8.5 x 14 in
Scan speed (normal, letter)

(Scan speeds measured from ADF. Actual processing speeds may vary depending on scan resolution, network conditions, computer performance, and application software.)

Scan speed (default)
Up to 57 ppm
Scanner features
Automatic paper sensor
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
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
Fax delayed sending
Fax broadcast
Junk fax barrier
Yes (poll to receive only)
Remote retrieval
Fax forwarding
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

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
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 system requirements; 200 MB available hard disk space
Macintosh: Mac OS X v 10.5 or higher; operating system compatible hardware system requirements, see:; 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; Novell (see for latest support); Linux (see; UNIX (see,, and; SAP device types (see and
Dimensions and weight
Dimensions (W x D x H)
39.96 x 27.95 x 43.90 in
Dimensions, max.           (W x D x H)
50.2 x 37.1 x 57.1 in (with trays fully extended)
192.9 lb
Package weight
240.3 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
What's included
What's in the box
HP LaserJet Enterprise M4555fskm 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; 3 x 500 paper feeder with stand; 900-sheet, 3-bin stapling mailbox; 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