Today, energy efficiency expert Matt Muenster and his fearless sidekick Owen are tracking down “phantom power” — also known as the power that’s still being drawn even though your devices are turned off.

With TVs, stereo components and game systems, media rooms are the perfect place to find this hidden menace. Luckily, phantom power is no match for a smart power strip. Adding one with a timer to control frequently used electronic devices can save the average household up to $100 a year.