Mono Laser Multifunction Printer: Print, Copy, Fax & Scan. Print Speed: 20 ppm in A4, 21ppm in Letter. 8.5 seconds first sheet. Resolution: up to 1200 x 1200 dpi effective output. 150 sheet Standard Tray. Paper size:A4 / A5 / Letter / Legal / Executive / Folio / Oficio / ISO B5 / JIS B5. Memory/Storage: 64 MB. OS Compatibility Windows 2000 / XP / Vista / Win7 / 2003 Server / 2008 Server /Mac OS X 10.4 - 10.7 / Various Linux OS. Interface Hi-Speed USB 2.0. Processor 433 MHz. Scanner. Resolution (Enhanced) Up to 4800x4800 dpi; Resolution (Optical) Up to 600x600 dpi. Scan Compatibility TWAIN Standard / WIA Standard. Scan to PC. Copier. Zoom Rate 25 - 400 %. Speed (Mono) Up to 20 cpm in A4 (21 cpm in Letter). First Print Out Time: (Mono) Less than 15 sec. Multi Copy 1 - 99 pages. Duplex Copy: Manual. Copy Features: Collation Copy / N-up Copy. Fax. Modem Speed 33.6Kbps. Memory 8 MB (600 Pages). Resolution Up to 300 x 300 dpi. Auto Dial: Yes (209 locations). Fax Feature: Mult-Send / Delayed Send / Priority Send / Secure Receive / Fax Forwarding. OS Compatibility: Windows 2000 / XP / Vista / Win7 / 2003 Server / 2008 Server /Mac OS X 10.4 - 10.7 / Various Linux OS. Noise Level: Less than 50 dBA (Printing), Less than 52 dBA (Printing), less than 26 dBA (Standby). Warranty: 12 months. WxDxH: 426x260x280mm with Handset. Weight: 6.34 kg with Handset.