This 4K Fiber Modular Matrix Dual Channel Card from DVDO is a daughter card that expands the output capability of your DVDO Modular Matrix Switcher. This card features two fiber outputs on a single card, saving you space in your mixer and maximizing the number of channels your mixer can support. The card features two ridged Phillips screw head tie-downs, allowing you to finger-tighten the card into your matrix switcher before you use a Phillips head screwdriver to tighten the card fully.