OKI B840DN B800 SERIES Mono Lazer Printer (1308001) - Print Speed: A4(Landscape) 40 ppm A3 22 ppm, Resolution: 1200 x 1200dpi, Memory: 128MB memory expandable to 640MB, Connectivity: 100BASE-TX/10BASE-T, USB 2.0 (High Speed), IEEE1284-1994 Bi-directional Parallel, USB 2.0 (High Speed) Host, Paper Size: A3, A4, A5, A6, B4, B5, B6, Letter, Legal 13, Legal 13.5, Legal 14, Executive, Envelopes, Custom Size: Width 76-297 mm x Length 148-432 mm, Multi-purpose Tray: 100 sheets, Input Capacity Tray 1: 530 sheets, Output Capacity: Face Down Max. 250 sheets, Face Up : Max. 100 sheets, Supported Operating System: Windows 7, Windows 7 x64, Windows Vista, Windows Vista x64, Windows XP, Windows XP x64, Windows Server 2008 R2, Windows Server 2008, Windows Server 2008 x64, Windows Server 2003, Windows Server 2003 x64, Mac OS X 10.6, Mac OS X 10.5, Mac OS X 10.4