6 DM 8G+ w/3 HDMI Output Card for DM Switcher. An assortment of output cards for DigitalMedia Matrix Switchers, providing versatile combinations of DigitalMedia (DM®), HDBaseT®, HDMI®, H. 264 streaming, and analog audio. Are you upgrading an existing DM switcher that has older multi-gang DMCO-series output cards? Use the online Output Card Additions and Upgrades Tool. To update your existing output cards and switcher to the new single-gang output card format. The item "CRESTRON DMC-CO-HD 8G STP Output 2 Card for DM Switchers DMCO-55" is in sale since Saturday, December 23, 2017. This item is in the category "Consumer Electronics\Home Automation\Home Automation Kits". The seller is "av_tek2000" and is located in Albany, New York. This item can be shipped worldwide.