OKI B432DN B400 SERIES Mono Printer (45762012) - Print Speed: A4 40 ppm, Resolution: 1200 x 1200dpi, Memory: None, Connectivity: 1000BASE-T/100BASE-TX/10BASE-T, USB 2.0 (High Speed), Paper Size: Tray 1: A4, A5, B5(JIS), A6, Letter, Legal 13, Legal 14, Executive, Statement Tray 2: A4, A5, B5(JIS), Letter, Legal 13, Legal 14, Executive, Multi-purpose tray: A4, A5, B5(JIS), A6, Letter, Legal 13, Legal 14, Executive, Statement, Envelopes (Monarch, Com-9, Com-10, DL, C5, C6), Custom Size (up to 1321mm length including banners), 4 x 6", 5 x 7", Duplex: Standard, A4, B5(JIS), Letter, up to Legal 14, Executive, Duplex: Standard, Output Capacity: Face Down Max. 150 sheets of 80gsm, Face Up Max. 100 sheets of 80gsm, Supported Operating System: Windows 8, Windows 8.1 x64, 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, Mac OS X 10.6, OS X 10.7, OS X 10.8, OS X 10.9, Linux