Epson C31C514767, 16 cpi, Gray, 64 dB, Ethernet, 180000 h, 24 V Epson C31C514767. Character density: 16 cpi. Product color: Gray, Sound pressure level (printing): 64 dB. Standard interfaces: Ethernet. Mean time between failures (MTBF): 180000 h. AC input voltage: 24 V