Both GreenWave and Stetzer only have plugin units. It is plugged into the breaker panel to protect the entire house. They also filter out high-priced audio and video equipment from harmful harmonics and electromagnetic interference (EMI). As a result, audio and video quality will be noticeably improved. All your appliances and equipment will run more efficiently with Power Perfect Boxes, which correct phase quality and lower total current and heat in appliances and equipment.
Using clean, regulated power in the home is more efficient because it doesn't have to deal with the spikes and surges inherent in your power supply. Ensuring the right amount of power is delivered to all of your home's electrical devices ensures that they run more efficiently and last longer, all of which contribute to lower utility bills.