Zebra ZD420 Direct Thermal Printer (ZD42042-D0EE00EZ) - Resolution: 203 dpi/8 dots per mm, Print Speed: 6 in./152 mm per second, Memory: 512 MB Flash; 256 MB SDRAM, Media Types: Roll-fed or fan-fold, die cut or continuous with or without black mark, tag stock, continuous receipt paper, and wristbands, Communications: USB, USB Host, BTLE, Modular Connectivity Slot - Ethernet, Operating System: Link-OS