P1112640-015 New Upgraded Ethernet Module for Zebra ZD421 ZD411 Thermal Printer Wired | Unique MAC Address, No Network Conflict | New Full Version Upgrade

["Full New Upgrade with Unique MAC Address -We upgraded both hardware and firmware to fix the old-version MAC duplication issue. Every card comes with a factory-preflashed unique independent MAC address — no duplicates at all. It eliminates common faults like network conflicts, IP errors, device offline and recognition failure.","1:1 Fit for Zebra ZD421D/ZD421T/ZD421C and ZD411 thermal printer, Premium OEM Replacement-This network card is custom-calibrated for Zebra ZD421 label printers. It matches the original interface and protocol fully, compatible with all ZD421 firmware versions. It restores stable LAN connection, fixes frequent network disconnection issues, and cuts your replacement cost without sacrificing performance.","Plug & Play, Tool-Free Easy Installation-No complex drivers or complicated configuration needed. The card features precise pin position and tight interface fit. You can finish replacement in minutes and restore your printer network function instantly. Save your time and labor cost effortlessly.","Brand New & Strict Quality Assurance -All units are 100% brand-new upgraded version, no refurbished or used parts. Every card passes strict pre-delivery tests, including MAC address verification, network connectivity and compatibility inspection. We offer 24-hour professional after-sales support to solve your connection and usage problems.","What's include: 1x Kit Upgrade Ethernet Wired Connection Module, ZD421d/t","*If you don't know how to set up the IP address, please consult the seller for installation instructions,thanks~"]