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. They are called Ground Fault Circuit Interrupter (GFCI) outlets, a built-in safety device for your home's electrical system. Those two buttons are not a random design quirk, but a necessity to prevent a shock or electrocution. This swift interruption is usually enough to stop a dangerous or fatal shock, which is why understanding the buttons that control this critical safety feature is essential for every homeowner.