Printing
Print speed (black, draft quality, A4/US Letter)	28 ppm
Colour
Duplex printing
Maximum resolution	1200 x 1200 DPI
Print speed (black, normal quality, A4/US Letter)	28 ppm
Time to first page (black, normal)	10 s
Economical printing

Features
Maximum duty cycle	75000 pages per month

Input & output capacity
Total input capacity	350 sheets
Total output capacity	250 sheets
Maximum input capacity	850 sheets
Maximum output capacity	250 sheets

Paper handling
Media types supported	Paper (plain, preprinted, letterhead, prepunched, bond, recycled, color, rough), transparencies, labels, envelopes, cardstock
Media size (tray 1)	A4, A5, B5 (JIS), envelopes, letter, legal, executive, 76 x 127 - 216 x 356 mm
Media weight (tray 1)	60 - 200 g/m²

Network
Network ready

Performance
Internal memory	48 MB
Maximum internal memory	304 MB
Built-in processor
Processor model	MIPS 20KC
Processor frequency	400 MHz

Power
Power consumption (PowerSave)	8.5 W
Power consumption (off)	0.4 W

System requirements
Minimum system requirements for Macintosh	160 MB free hard disk space, Mac OS 9.x and Mac OS X v 10.1 and later, CD-ROM drive, USB (compatible with USB 2.0 specifications) port or IEEE 1284-B compliant parallel port

Operational conditions
Operating temperature (T-T)	15 - 32.5 °C
Storage temperature (T-T)	-20 - 40 °C
Operating relative humidity (H-H)	10 - 80%
Storage relative humidity (H-H)	10 - 90%

Sustainability
Sustainability certificates	ENERGY STAR

Weight & dimensions
Weight	16.3 kg
Dimensions (WxDxH)	425 x 400 x 260 mm

Packaging data
Package weight	19 kg

Packaging content
Bundled software	Print drivers and installation software on CD-ROM; Microsoft Windows Installer, Macintosh Installer, HP PCL 6 and HP PCL 5e print drivers (Windows 95, 98, Me, NT 4.0, 2000, XP), HP PostScript Level 3 Emulation (Windows 98, Me, NT 4.0, 2000, XP, Server 2

Other features
Additional paper trays	Optional 500-sheet paper tray
Print quality (black, draft quality)	600 DPI

Other features
Standard input capacity for transparencies	75
Print quality (black, normal quality)	1200 DPI
Recommended operating temperature range (T-T)	15 - 32.5 °C
Mac compatibility
I/O ports	1 x IEEE 1284-B parallel 1 x USB 2.0 1 x EIO
Custom media sizes	76 x 127 - 216 x 356 mm
Standard media sizes	A4, A5, B5 (JIS), letter, legal
Print margin bottom (A4)	5 mm
Print margin left (A4)	5 mm
Print margin right (A4)	5 mm
Print margin top (A4)	5 mm
Typefaces	80
Media weights by paper path	60 - 200 g/m²; 60 - 120 g/m²
Standard output capacity for envelopes	10 sheets
Minimum system requirements	Microsoft Windows 98: Pentium 90, 16 MB RAM, CD-ROM drive; Windows Me: Pentium 150, 32 MB RAM, CD-ROM drive; Windows NT 4.0: Pentium 90, 32 MB RAM, CD-ROM drive; Windows 2000: 133 MHz processor, 64 MB RAM, CD-ROM drive; Windows XP: 233 MHz processor, 6
Printer management	HP Web Jetadmin, HP LaserJet Utility, HP Embedded Web Server, E-Toolbox
Acoustic power emissions	6.7 B(A)
Power requirements	100 - 127V / 220 - 240V, 50/60 Hz (+/- 2 Hz)
Duplex print options	Automatic (standard)
Print speed (black, best quality, A4)	28 ppm
Paper handling	HP LaserJet 2420 series printers: Built-in automatic duplex unit (HP LaserJet 2420d/dn only), 350 sheets standard input capacity (1x 100-sheet/ 10 envelope multipurpose tray, 1x 250-sheet tray), paper input level indicators, straight-through paper path, s
Electromagnetic compatibility	CISPR 22: 1997/EN 55022: 1998 Class B, EN 61000-3-2: 2000, EN 61000-3-3: 1995+A1, EN 55024: 1998, FCC Title 47 CFR, Part 15 Class B (US), ICES-003, Issue 4 (Canada), GB9254-1998, EMC Directive 89/336/EEC with CE Marking (Europe); other EMC approvals as re
Standard input trays	2
Networking features	Via HP Jetdirect Internal Print Servers for Fast Ethernet, Gigabit Ethernet; 802.11b wireless connectivity Optional: HP Jetdirect Fast Ethernet Embedded Print Server
Print quality (black, best quality)	1200 x 1200 DPI
Standard output capacity for transparencies	75 sheets
Driver updates	Most recent printer drivers and software for all supported operating systems available at http://www.hp.com/support/lj2400; OS/2 drivers are available from IBM and are packaged with OS/2
Duplex supported media size	A4, letter, legal, executive
Memory technology	Memory Enhancement technology (MEt), Double Data Rate memory technology
Control panel	Graphical display with up to 2 lines of text; Help button (?) to provide information about the message on the display; Back button to back up in menus or exit menus; Pause/Resume button to pause and resume printing; Up Arrow button to navigate to previous
Maximum paper trays	3
Media size (tray 2)	A4, A5, B5 (JIS), letter, legal, executive
Media type and capacity (tray 2)	250
Media weight (tray 2)	60 - 120 g/m²
Media weight (tray 3)	60 - 120 g/m²
Paper handling optional/input	500-sheet input tray
Paper handling standard/input	100-sheet multipurpose tray (tray 1), 250-sheet input tray (tray 2), automatic duplex printing
Paper handling standard/output	250-sheet top output bin (100-sheet rear output bin)
Power consumption (active)	625 W
Safety	IEC 60950 (International), EN 60950 (EU), IEC 60825-1+A1+A2, UL/cUL Listed (US/Canada), GS License (Europe), EN 60825-1+A11+A2 Class 1, 21 CFR Ch. 1/SubCh. J (Class 1 Laser/LED Device) GB4943-2001, Low Voltage Directive 73/23/EEC with CE Marking (Europe);
Upgrade type	Printer firmware and networking firmware can be remotely upgraded
Service & support	HP Web sites, HP Customer Support Center, HP Care Packs
Technical features	Add fonts, forms, and third-party solutions via CompactFlash support
Compatible operating systems	OS/2, UNIX, Linux, HP OpenVMS Microsoft Windows 98, Me, NT 4.0, 2000, XP, Server 2003; Apple Mac OS 9.x and later, OS X v.10.1 +
Package dimensions (WxDxH)	592 x 495 x 347 mm