Epson LQ-680 Pro. Maximum print speed: 465 cps, Maximum resolution: 360 x 180 DPI, Maximum print speed (draft): 372 cps. Maximum print size: A4 (210 x 297 mm). Product colour: Grey, Buffer size: 64 KB, Sound pressure level (printing): 55 dB. Standard interfaces: Parallel, Optional connectivity: Ethernet, Serial (RS-232). Print head: 24-pin, Ribbon life (black, draft): 2 million characters, Mean time between failures (MTBF): 10000 h