HP's commitment to practical, enabling innovation has made it the industry standard in laser printing for over 13 years. HP LaserJet 4000 series printers set yet another benchmark, affording you the latest in network printing technology backed by unparalleled quality, reliability and compatibility.HP LaserJet 4000 series printers bring significant technology improvements to workgroup laser printing. The HP LaserJet 4000 printer is a solid foundation for your printing needs. This family of printers provides faster performance with new 17-page-per-minute engine and 100-MHz RISC processor outperform other laser printers and two 32-bit PCI-based Enhanced I/O (EIO) slots that deliver faster throughput and greater flexibility. HP FastRes 1200 (printer default mode) prints 1200-dpi quality at the same speed as 600-dpi and with standard memory. HP ProRes 1200 gives you true 1200-dpi output. HP UltraPrecise toner uses 5-micron particles (less than one-half the size of most other brands) for more accurate dot placement, enhanced grayscale and photo-like quality. These models are supplied with new improved drivers, with intuitive interfaces and automatic Internet update capability. All printers have 4 MB of memory preinstalled (expandable up to 100MB) and an HP JetDirect 600N print server for Ethernet networks. 4000N and 4000TN models have the same features as the HP LaserJet 4000 printer, but with 8 Mbytes memory and an HP JetDirect 600N print server for a fast and easy way to connect to an Ethernet network (10BT LocalTalk, BNC Connections). All the printers are easy to install and upgrade. No limits for memory expansion make this model flexible for use in complicated networks.