The Essential Surge Protector safeguards your home electronics against harmful power fluctuations and secures your everyday power needs. Get complete protection for cell-phone chargers, radios, answering machines, and other home essentials.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.