Lexmark 2580. Maximum resolution: 240 x 144 DPI, Maximum print size: A4 / Letter (216 x 297 mm). Maximum print speed: 510 cps, Normal print speed: 304 cps. Optional connectivity: Internal RS-232C serial, Standard interfaces: USB 2.0. Mean time between failures (MTBF): 12.500 h. Noise level: 56 dB, Noise level (idle): 0 dB