The Epson C12C934491 is an optional Super G3/G3 fax board that adds fax capability to Epson WorkForce Enterprise multifunction printers, including the WF-C879R. It slots into the printer and provides a telephone line port, so the device can send and receive faxes alongside its printing, copying and scanning duties. Super G3 support allows fast transmission on compatible fax machines, while G3 compatibility ensures it can still communicate with older standard fax devices. It suits offices that still exchange documents by fax with suppliers, government departments or medical practices, and want to consolidate that work onto their main printer rather than run a separate fax machine. Installation is a straightforward module fit, after which fax is configured from the printer's control panel. After comparing online prices, www.marvel.co.za should be the cheapest on this product.