Ml5721 9 pin dot matrix eco version includes a more energy efficient power supplythe ml5720eco and wide carriage ml5721eco dot matrix printer deliver fast reliable multi part forms printing and low running costs their high 700cps characters per second print speeds fast throughput and ability to manage heavy medias make them perfect for demanding environments such as vehicle repair service centers warehouses factories wholesalers and freight forwarders impressive 700cps print speeds 9