The DUAL FAX OEM Ricoh Savin Lanier Option Type M20 is a fax board designed for use with specific Ricoh, Savin, and Lanier copier models such as the MP C4504 and C6004 EX. This dual fax option allows for sending and receiving faxes directly from the copier, providing a convenient and efficient solution for businesses that require reliable fax capabilities. With the trusted brands of Ricoh, Savin, and Lanier, users can expect high-quality performance and compatibility with their existing office equipment.