Zebra S4M ( dpi) - EPL Windows printer drivers by Seagull Scientific make it easy to print labels, cards and more from any true Windows program, including. S4M™. Industrial/Commercial Printer. User Guide Liability Disclaimer Zebra Technologies Corporation takes steps to ensure that its. printer, or adding new printers, Zebra's S4M thermal printer delivers speaks the same programming languages (ZPL® and EPL™). dpi/8 dots per mm.