HDMI Coupler, primarily intended for joining two HDMI Cables together. The coupler has gold plated contacts for enhanced signal transfer. Please note that results obtained by joining HDMI cables together using these couplers is not guaranteed. It all depends on the quality of the cable and of your HDMI enabled equipment. We have successfully tested this setup with two of our 10m cables joined together, which is workable, but if you are looking for a 20m cable we recommend that you purchase the real McCoy. Our customers feedback has been extremely positive so far, but results will vary!Important - for this reason, there are absolutely no returns on this product.