GK420d Healthcare Desktop Printer Support & Downloads | Zebra
Resetting the Network Configuration on a Zebra GK420d Printer - YouTube
Amazon.com : Zebra - GX420d Direct Thermal Desktop Printer for Labels, Receipts, Barcodes, Tags, and Wrist Bands - Print Width of 4 in - USB, Serial, and Parallel Port Connectivity (Renewed) : Office Products
How to configure the Zebra GK420D printer for printing Royal Mail's 2D barcode labels