Housing meets IEC 60945 standards for maritime use. The maritime-certified DKM HD Video and Peripheral Matrix Switch System is 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. 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 Can be rackmounted by using ACXMODH-RMK and the rackmount ears for the individual chassis (ACXMODHEAR-2).