Features: Save energy source efficiently environment-friendly. Stabilize the voltage and balance the current source. Stand current waveform protect devices. Prolong the life of the electric devices. Easy usage no need maintenance. Description: New-type intelligent and digital electricity-saved device. More stable and efficient in performance. Reduce the electric appliances getting fever. Specifications: Material: Plastic, Metal Color: white Size: 110*55*35mm Rated voltage: 90V-250V Rated frequency: 50-60Hz Useful load: 30000W Plug type: EU plug, US plug, UK plug