GK420d Direct Thermal Printer (203 dpi, EPL2, ZPL II, Serial and USB Interfaces, CP Enhanced) The Zebra GK420d direct thermal printer offers the best value in a basic desktop printer, featuring a fast 5 inches per second print speed to meet your low- to medium-volume printing requirements. The GK420d has a sleek and compact design, boasts the smallest footprint in a 4-inch desktop printer, and supports a variety of applications and industries. The GK420d comes standard with EPL and ZPL programming languages, and dual connectivity (USB, serial) for easy integration into existing systems. For additional flexibility, 10/100 internal Ethernet is also available. Well-suited to any industry, the reliable GK420d desktop printer is a smart investment that's always a perfect fit.