Print speed Letter: Up to 52 ppm black / First Page Out Black: As fast as 7.5 secPrint resolution Black (best): Up to 1200 x 1200 dpiPrint Technology Laser Print Resolution Technologies: HP ImageREt 3600 (600 x 600 dpi), HP ProRes 1200 (1200 x 1200 dpi)Print Cartridges Number 2 (black)Standard Print Languages HP PCL 6, HP PCL 5e , HP Postscript Level 3 emulation, native PDF printing (v 1.7)Printer Smart Software Features HP ePrint, Apple AirPrint, HP Auto-On/Auto-Off Technology, HP FutureSmart Firmware, Easy Access USB, Hardware Integration Pocket, Open Extensibility Platform, HP Web Jetadmin, HP Universal Print Driver, 4-line color display control panelPrinter Management Printer Administrator Resource Kit (Driver Configuration Utility, Driver Deployment Utility, Managed Printing Administrator) HP Web JetAdmin Software HP Proxy Agent Software HP Imaging and Printing Security Center HP Utility (Mac)Standard Connectivity Hi-Speed USB 2.0 ports (Host and Device) built-in Gigabit Ethernet 10/100/1000T network port Hardware Integration Pocket (HIP)Network Capabilities Via HP Jetdirect Ethernet embedded print server (standard) supports: 10Base-T, 100Base-Tx, 1000Base-T 802.3az (EEE) support on Fast Ethernet and Gigabit Ethernet IPsec (standard)Network Ready Standard (built-in Gigabit Ethernet)Wireless Capability Optional, enabled with purchase of a pending hardware accessoryMobile Printing Capability HP ePrint, Apple AirPrintMemory Standard: 512 MB Maximum: 1.5 GBMass Storage 4GB non-volatile storage, Firmware encryption (AES 128 or AES 256) of customer/job data Secure Cryptographic Erase Job Data, Secure EraseDuty Cycle Monthly, letter: Up to 175,000 pages/ Recommended Monthly Page Volume: 5000 to 13,000Paper Handling Input Capacities: 100-sheet multipurpose tray 1, 500-sheet input tray 2 Automatic duplexer for two-sided printing (M604dn) Up to 600 sheets standard labels legal Output Capacities: 500-sheet output bin 100-sheet rear output bin Up to 600 sheets (500 in the face down bin, 100 in rear face up door) standard labels legal Duplex Options: No(M604n) Yes (M604dn) Envelope Feeder: Yes, 75 Standard Paper Trays: 2 Media Types Supported: Paper (bond, color, letterhead, plain, preprinted, prepunched, recycled, rough, light), envelopes, labels, cardstock, transparencies, shelf edge labels, user-defined Media Weight Supported: Multipurpose tray 1: 16 to 53 lb Tray 2, optional 500-sheet input tray, optional Custom media cassette, optional 1500-sheet High-capacity input tray: 16 to 32 lb Optional Envelope feeder: 20 to 28 lb Optional Duplexer: 16 to 32 lb Media Sizes Supported: Multipurpose tray 1: letter, legal, executive, statement, 8.5 x 13 in, 3 x 5 in, 4 x 6 in, 5 x 7 in, 5 x 8 in, envelope (commercial No. 9, No. 10, Monarch), US postcard Tray 2, optional 500-sheet input tray: letter, legal, executive, 8.5 x 13 in optional 1500-sheet High-capacity Input tray: letter, legal Media Sizes Custom: Multipurpose tray 1: 3 x 5 to 8.5 x 14 in Tray 2, optional 500-sheet input tray: 5.83 x 8.27 to 8.5 x 14 in Optional Custom media cassette: 4.02 x 5.83 to 6.69 x 11.10 inWhats in the box HP LaserJet M604 Pre-installed HP Black LaserJet Toner Cartridge Installation guide, Support flyer Printer documentation and software on CD-ROM Power cord Pre-installed HP Duplexer (only for dn model)Energy Efficiency Compliance Energy Star certified Blue Angel CECP EPEAT SilverControl Panel 4-line color LCD display, 3 LED lights (Ready, Data, Attention), buttons (Information, Stop/Cancel, Return, Home, Folder, Clear), 10-key numeric keypadDisplay Description 4-line LCD (color text and graphics)