The ZD421, built on Zebra's popular GK series, offers additional advanced features, flexibility, and security for years of trouble-free printing. It is available as both a thermal transfer and a direct thermal model. With the five LED indicators, users can quickly see what is needed to keep the printer operational, from media replenishment to troubleshooting printer issues. Advanced remote management capabilities help you optimize your printers, track and automate the reordering of supplies, and ensure security.