SPECIFICATIONS G.3GMemoryCLP-550: 64 MB (Max. 320 MB)CLP-550N: 128 MB (Max. 384 MB)64, 128, 256 MB optional memory availableUse only the Samsung-approved DIMM.64 MB: ML-00MC; 128 MB: ML-00MD, 256 MB: ML-00MEFonts 136 PostScript3, 45 PCL5CEInterfaceCLP-550: USB 2.0, IEEE 1284 ParallelCLP-550N: USB 2.0, IEEE 1284 Parallel, Ethernet 10/100Base TXPrinter Drivers*****• PostScript Driver: Windows 95/98/Me/Nt4.0/2000/XP,Various Linux OS, Mac OS 8.6~9.2/10.1~10.3• Samsung proprietary driver: Windows 95/98/Me/Nt4.0/2000/XPOptionsCLP-550: Ethernet 10/100 Base TX(Internal), Ethernet 10/100 Base TX + 802.11b Wireless LAN(Internal)CLP-550N: Ethernet 10/100 Base TX + 802.11b WirelessLAN(Internal)*Print speed will be affected by Operating system used, computing performance, application software,connecting method, media type, media size and job complexity.**Sound Pressure Level, ISO7779***May be affected by operating environment, printing interval, media type, media size and color/black.****Compatible with PCL6 Version 2.1*****Please visit www.samsungprinter.com to download the latest software version.Item Specifications and Description