If your business relies on scannable barcodes or aesthetic retail labels, do not use the free driver. Purchase the (approx. $49). It includes a "Quality Slider" that actually modifies the pulse width of the thermal print head, delivering true extra quality that free drivers cannot replicate.
: The standard driver package for the PRP-300 series (including the 188, 250, and 350 models) is available as a .rar attachment from Fametech Inc.