* Key Digital® HDMI® product specifications are given using only Key Digital HDMI cables. Using any other cables can alter or prevent your Key Digital HDMI product from meeting the given features and benefits of our advanced line of HDMI products. HDMI Products using CAT5/6/7 cabling should be properly terminated and of high grade in order to maintain the best performance possible. cables will insure these products good performance in hostile RF interference environment.