ZEBRA ZD621 Thermal Transfer Desktop Printer 203 dpi Print Width 4-inch USB Serial Ethernet ZD6A042-301F00EZBrand: ZEBRA Color: Gray Features: Easy to use: Connects via USB, Ethernet, Serial, and is compatible with media rolls that have a 1 in core, a max diameter of 5 in, and a max width of 4. 25 in Thermal transfer technology: Requires the use of a thermal ribbon; can also print using Direct Thermal technology which requires the use of direct thermal media but no ribbon required Powerful: Fast print speeds, superior performance, and top print quality for