The Dymo LabelWriter 550 prints address, barcode and file folder labels from a desktop, which is the difference between labelling a mail run in one sitting and returning to it. It prints by direct thermal, so there is no ink and no toner to buy: heat brings out the image on the label stock itself, and the only consumable is the roll.Automatic label recognition reads the roll as it is loaded and tells the software what is in the machine, so a job set up for one label size does not print onto another. That removes the most common cause of wasted labels, which is a size mismatch discovered only after a run has started.Specifications Model Dymo LabelWriter 550 Print technology Direct thermal Label recognition Automatic Consumables Label rolls only, no ink or toner Brand Dymo See the full range of label printers, or browse everything from Dymo.