Have you ever noticed how some electrical outlets in your home look slightly different from the rest? Instead of a smooth plate, these outlets feature two small buttons, often colored black and red.

The majority of electrical outlets in your home look more or less the same: two outlets, three holes in slightly different shapes to insert up to three prongs and deliver electricity. Some outlets ...

John Carlsen has more than a decade of experience testing and reviewing home tech products, with a major focus on smart home security. He earned his BS in journalism from Utah Valley University. In ...