ZT420 - Thermal Transfer and Direct Thermal print modes - 203 dpi - 8 dot/mm - Max Print Width: 168mm - Media Handling: Tear-Off - UK and Euro Cords - USB 2.0, USB Host, Serial, 10/100 Ethernet, Bluetooth 2.1 - 256 MB RAM / 512 MB Flash - Adjustable Transmissive and Fixed Reflective Sensor - Real Time Clock - ZPL and EPL firmware