Technology : Laser Max Resolution: Black (best): Up to 600 x 600 dpi, Color (best): Up to 600 x 600 dpi Print Speed : Up to 28 ppm Automatic Duplexing : Automatic Media Sizes : A4, A5, A6, B5 (JIS), B6 (JIS), 16K (195 x 270 mm, 184 x 260 mm, 197 x 273 mm), 10 x 15 cm, Oficio (216 x 340 mm), postcards (JIS single, JIS double), envelopes (DL, C5, B5) Total Media Capacity : Up to 250 sheets Interface : USB, LAN Monthly Duty Cycle (max) : Up to 50,000 pages A4 RAM: 256 MB