The Zebra dispenser upgrade kit (MPN P1112640-231) is a peel-and-present/dispenser unit that is field-installed for the Zebra ZD421T thermal transfer printer. It automates the removal of labels from their backing and presents them for removal, improving print-and-apply speed and operator efficiency. The unit mounts on the front of the printer, is powered by the printer itself (no external power supply), and requires a short installation and media calibration process. Specifically compatible with the ZD421T printer (thermal transfer).