The StarTech ST121HD20FXA2 is a 4K HDMI over fiber extender kit that allows you to extend the distance of your HDMI connection up to 120 meters while maintaining a high resolution of 4K 60Hz. This kit includes everything you need to set up a reliable and high-quality HDMI connection over fiber optic cable. The StarTech brand is known for its reliable and durable products, making this extender kit a great choice for professionals and home users looking to extend their HDMI reach.