4 Pieces Power Saver, Power Saver Electricity Saving Box Energy Saver and High Efficiency Household Energy Saver?Perfect Power Saving Device?According to customers' usage habits and feedback, 4-pack of power-saving boxes can provide ideal power-saving effect for a family. They can keep vol. ?CONVENIENT?: You just plug the economizer into a power outlet, the green light will turn on, and then keep the device connected and start working, the economizer itself consumes no current and can continue to work all day in any climate.It will save up to 30% of electricity consumption. The power-saving effect of the smart electricity regulator will be displayed on your energy bill. ?APPLICABLE?: The advantages of this kind of equipment can be seen in air conditioners, washing machines, refrigerators, TVs, water pumps, induction cookers, electric kettles, stereos and other power bill killers. When the power factor saver works normally under the rated load, it can prevent the electrical appliance from overheating and protect the electrical appliance. ?Save Electricity Bills?:When the power-saving device is working under rated load, it will release the stored electricity through the capacitor system to normal in a more stable manner without spikes. We can see a big difference in electricity bill when we use power-saving boxs with air conditioning, washing machines, refrigerators, water pump, induction cooker, electric kettle, etc. But there are no electricity saving benefits for some appliances, such as electric fan, LED bulbs, etc. ?Safe and Reliable?:When the power saving device works under the rated load, the stored electric energy is released in a more stable way through the capacitive system, and there will be no spikes. The shell of the surge protector adopts advanced fireproof and explosion-proof materials, and the internal leakage protection measures make it safe and reliable.