The KanexPro HD4FOICARD is a 4-Output fiber optic module that works with the HDMMX modular matrix switchers. The fiber optic 4-input card provides audio and RS-232 for full system support and control. System installers can add or remove this card to increase or decrease input channels. It's a high-bandwidth card that supports LC single core and single-mode for transmission up to 10 kilometers.