The Ultimate Surge Protector commands high performance, with superior power protection for your sensitive home theater equipment. By reducing power line noise and damaging voltage fluctuations, Belkin Surge Protectors safeguards HDTVs, stereo and satellite systems, Blu-ray® players, video-game consoles, and more. Keep your high-end equipment protected, while ensuring the clearest picture and sound possible.Please note: The protective components inside surge protectors absorb over-voltage spikes to protect your connected devices which means they will eventually wear out. Replace them every 3 years or immediately after any over-voltage spike event such as a thunderstorm or power outage because surge protectors degrade faster if they are exposed to high intensity events. Periodically check the surge protector enclosure and cable for signs of wear or heat distress. Replace an expired surge protector with a new one at the end of its useful life.