This Zebra ZD621 label printer is a monochrome thermal transfer desktop printer with a maximum resolution of 203 x 203 DPI. It has a memory capacity of 512 MB and supports various connectivity options such as Serial (RS-232), Serial (RS-232C), Ethernet (RJ-11), Ethernet (RJ-45), and USB 2.0. The printer is portable and networkable, making it ideal for small to medium-sized businesses that require efficient label printing solutions.

With its black print speed of 8 ppm, this Zebra ZD621 printer is perfect for printing labels for files, folders, envelopes, and more. Its product line, Zebra Z, is known for its high-quality printing services, and this model is no exception. It is an excellent choice for those who need a reliable, fast, and efficient label printer.