Features: Our power savers can improve the power of electrical appliances and reduce energy waste by stabilizing voltages and balancing current, thus reducing your electricity bill. Perfect energy saving assistant helps you reduce your electricity bill. The energy savers has overload protections, over-voltages protections, and over heating protections. It will not damage your appliances, safe, stable, and very easy to install. The power saving device is designed with a compact size, and it will not occupy too much space, so you can use it anywheres has a socket.Eeasy to use, just plugs it into a socket, and it will work. The energy savers has an indicators light that will light up when it works, making the power-saving process visible, and more convenient. Our energy saving device is suitable for air conditioners, washing machines, refrigerators, water pumps, induction cookers, kettles and more. It prevents electrical overheating and works smoothly under load. Specifications: Component: Plastic Quantity: 1Pc/2Pcs/4Pcs Size: about 9.6x5.5cm/3.78x2.17inch voltages: 90V-250V frequency: 50HZ-60HZ Package Includes: 1Pc/2Pcs/4Pcs energy savers note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.