DKM FX Extender Modular Housing - 4-Slot Chassis with Power Supply and Redundancy Option This housing can accept a total of (4) extender modular cards for the DKM FX HD Video and Peripheral Matrix Switching System. ACXMODH4R-R2 Features - Part of the DKM FX HD Video and Peripheral Matrix Switch System of transmitter and receiver interface cards and housings. - Supports (4) transmitter or receiver cards. - Includes a single external power supply, plus an optional redundant power supply input. (Redundant power supply sold separately.) - Can be rackmounted with ACXMODHEAR4, 19" 1U rackmount ears for the chassis. The DKM FX Extender System is comprised of modular housing chassis with 2, 4, 6, or 21 slots and transmitter and receiver interface cards. The DKM FX extender setup provides the widest range of possible combinations, which makes it easy to customize for your specific application. - Four housings are available: desktop housing for two, four, or six boards or a 19-inch, 4U rack for 21 boards. - The 2-port chassis will support an external power supply. - Can be rackmounted by using ACXMODH-RMK and the rackmount ears for the individual chassis (ACXMODHEAR-2). These new DKM FX components are part of a modular system. You will need to contact Black Box to have them assembled to fit your application.