TL;DR: Longer active HDMI cables usually have a micro USB or USB-C connector to supply power to the internal chipset used for signal boosting. These ports won't be needed anymore if you get a cable ...
The FocalPoint-USB Type A and Type B USB cables offer 360° rotation to accommodate a variety of connection situations. Measuring 1.775 (L) x 0.665 (W) x 0.350 (H) in., the cables lock with a twist and ...