Description: This intelligent digital and powerful electricity saving device offers the accurate and stable work electric voltage for loading and promotes the quality of the power supply. It reduces the electric appliances getting fever and save the maintain cost, meanwhile it efficiently saves the energy sources . It stabilizes the voltage and balance the current source, prolonging electric appliances' lifespan. Use one or several devices according to the electric appliances quantity and loading, it can immediately attain the electricity-saved effect. Fashion design with LED lights indicators, easy to operate, no need maintenace, no need pay too more attention. Specification: Material: Plastic Electronic components Size: 11.5x6.5x3.5cm/4.5x2.6x1.4inch Rated Voltage: 90V-250V Working Temperature: -60 to 75 Degree Rated Frequency: 50Hz-60Hz Package Includes: 1 Piece Electricity Saving Device 1 Piece Manual Note: After using, don't take off too often to avoid influencing the result of saving electricity. Don't let the kids touch it. Assure the safety. Please allow slightly 0-1cm difference due to manual measurement. Thanks for your understanding and attention. Wish you a pleasant shopping experience!