ZEBRA ZD621 Thermal Transfer Desktop Printer 300 dpi Print Width 4 inch USB Serial Ethernet Connectivity ZD6A043-301F00EZ, Requires Thermal Ribbon for UseBrand: ZEBRA Color: Gray Features: Easy usage: Connects via Ethernet, Serial, wired USB 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 . Let your needs determine the connections the precise way you need it with our plethora of adaptable options where you need them the most Dual thermal: Requires the use of a thermal ribbon; can also print using Direct Thermal technology which requires the