The Belkin 12 outlet surge protector is perfect for home office use.�With 6 regular outlets and 6 Blockspace™ outlets, this protector can handle even oversized printer and charger plugs. The convenient USB ports allow you to charge your phone or MP3 player while working, surfing or checking email. This surge protector also features 3996 joules of protection to keep equipment safe and advanced power filtration to help maintain data integrity and optimal system performance.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.