Technology : Laser Max Resolution: Black (best): 600 x 600 dpi, up to 4800 x 600 enhanced dpi Print Speed : Black (A4, normal): Up to 43 ppm, Black (A4, duplex): Up to 34 ipm Automatic Duplexing : Automatic Media Sizes : Custom (metric): Tray 1: 76.2 x 127 mm to 215.9 x 355.6 mm; Tray 2, Tray 3: 105 x 148 mm to 215.9 x 355.6 mm, Supported (metric): Tray 1: 10 x 15 cm, A4, A5, A6, Envelope B5, Envelope C5, Custom, Envelope DL, B5 (JIS), B6 (JIS); Tray 2, Tray 3: A4, A5, A6, Custom, B5 (JIS), B6 (JIS) Total Media Capacity : Up to 1200-sheet Interface : Hi-Speed USB 2.0 Host/Device Ports; Fast Ethernet 10 Base-T/100 Base-TX, Gigabit Ethernet 1000 Base-T Monthly Duty Cycle (max) : Up to 100,000 pages A4 RAM: 256 MB