OKI B412DN B400 SERIES Mono Printer (45762002) - Print Speed: A4 33 ppm, Resolution: 1200 x 1200dpi, Memory: None, Connectivity: 1000BASE-T/100BASE-TX/10BASE-T, USB 2.0 (High Speed), Paper Size: A4, A5, B5, A6, Letter, Legal 13, Legal 14, Executive, Statement, Envelopes, Custom Size: Width 86-216 mm x Length 140-1321 mm, Multi-Purpose Tray: 100 Sheets, Duplex: Standard, Input Capacity Tray 1: 250 sheets, Output Capacity Face Down: Max. 150 sheets Face Up: Max. 100 sheets, Supported Operating System: Windows 8.1 x64, Windows 8, Windows 8, Windows 8 x64, Windows 7, Windows 7 x64, Windows Vista, Windows Vista x64, Windows Server 2012 R2, Windows Server 2012, Windows Server 2008 R2, Windows Server 2008, Windows Server 2008 x64, Windows Server 2003, Windows Server 2003 x64, OS X 10.9, OS X 10.8, OS X 10.7, Mac OS X 10.6