OKIPOS 441 Series dot matrix (SIDM) printers are additions to the OKI Printing Solutions growing line of point-of-service printers. Built specifically to work in environments where heat and humidity can erode the type on a thermal-printed order, the OKIPOS 441 Series is an ideal solution. These fast printers offer crisp, clear type for easy viewing, a clamshell design for easy paper loading, and an embedded power supply for space efficiency in cramped quarters.