The maritime-certified DKM HD Video and Peripheral Matrix Switch System are comprised of modular housing chassis with two or six slots and maritime-certified transmitter and receiver interface cards. The DKM extender setup provides the widest range of possible combinations, which makes it easy to customize. This is part of a modular system. You will need to contact Black Box to have your system assembled to fit your application. To configure your DKM HD Video and Peripheral Matrix Switch setup, call our FREE Tech Support. Two maritime-certified housings are available: for two or six boards. Supports an external power supply. The 2-slot chassis will accept up to (2) modular cards in a 19" rack mount chassis for the DKM and has built-in 5-VDC, 10-Amp internal power supplies. It can be rack-mounted by using ACXMODH-RMK and the rackmount ears for the individual chassis (ACXMODHEAR-2).