The power saver can improve the efficiency of electrical appliances by stabilizing voltage and balancing current, and avoid the waste of invalid electricity. It can save 20-50% electricity consumption and reduce your electricity bill. The energy saver has overload protection, over-voltage protection, and over-heating protection. It will not damage your appliances, safe, reliable, and very easy to install. The longer the power energy saver is used, the better the effect will be. The electric bill killer is suitable for almost all electrical equipment, such as tumble dryers, washing machines, coffee makers, ovens, bread machines, game consoles, printers, TV, hi-fi system, DVD, and more, widely used for home, shops, restaurants, offices, small factories, etc.