Guys if you're having trouble with loose switches and the adapters just pop out again and again with sparking every time you try to put it in, then you definitely need this. You will never need to adjust your adapter's plug again ever. On top of that, you're getting surge protection whose importance I don't need to stress upon. Can be used at home. Works wonders for travels. Special thanks to the seller for staying true to the very last line in product description. Amazon's service and delivery is just so good that I don't thank them anymore now and just take them for granted. Pun intended.