Products > Oki > Black & White Printers Oki MPS420b 30 Prints per Minute 5.5-second time to first page Clear, crisp output at up to 1200 x 1200 dpi 297 MHz processor Upgradable to 320 MB RAM Standard USB and available with internal print server connectivity Optional 530-sheet 2nd paper tray Oki MPS5112 Up to 47 Prints per Minute First page prints in as little as 4.5 seconds Duplex (2-sided) printing standard up to 1200 X 1200 dpi High-speed USB 2.0 and 1 GB Ethernet connectivity 667 MHz processor 630-sheet standard paper input Maximum 1,160 sheets with options Optional WiFi® wireless LAN Oki MPS5501b Up to 55 Prints per Minute First page prints in as little as 5 seconds Duplex (2-sided) printing standard Standard high-speed USB and 1 Gigabit Ethernet connectivity 256 MB RAM standard, upgrades to 768 MB Powerful 800 MHz processor 630-sheet standard paper input Maximum 3,160 sheets with options 100-sheet multi-purpose tray