Fast environmentally friendly 24 pin printer that handlersquos high print volumes with ease 24 pin 136 column dot matrix printer up to 473 characters per second cps print speed eco friendly technology sleep mode consumes just 15w ibm and epson emulations multi part paper handling original 4 copies usb and parallel interfaces with rs232 and network options superb quality energy efficient high volume printing the 136 column ml5591eco dot matrix printer is perfect for high speed