The Range of Application - We can see the merit of this stopwatt energy saving device on air conditioning, washing machines, refrigerators, water pump, induction cooker, electric kettle, etcand prevent electrical overheating when it operates normally with the rated load. But for some small appliances, such as electric fan, LED bulbs, there are no electricity saving benefits. Suitable for houses, condominiums, apartments, shop lots, restaurants, hotel, offices, small factories. Super Easy to Use - Just plug the stop watt energy saver into a power socket and the green indicator light will be bright, then starts to work by keeping the device connected; it will reduce your power consumption and effectively save electricity up to 20%-35% of electrical consumption for heavy duty load. The effect of energy saving usually begins to take effect in about 1 month, and 2-3 months to achieve the best effect. Almost No Extra Consumption - The stopwatt energy saving device itself have almost no consumption of energy, so you can use it to save power which is consumed by the electric appliance such as refrigerator, air-conditioner, television and so on. Even 24 hours 365 days, all-weather running will not increase the burden of electricity bills. Safe and Reliable - The stop watt energy saving device will release the electricity which it stored by using a system of capacitors in a smoother way to normal without the spikes when it works under the rated load, and the external shell of this electricity energy saver adopts advanced fire-proof and explosion-proof material, and the internal leakage protection measures make it safe and reliable. The longer the power energy saver be used, the better the effect will be. Save Energy and Money - The function of Power Saver Pro is to stabilize the voltage, balance the current, and surge protection in order to achieve power-saving effect. The power energy saver can also improve the use of electrical appliances power, avoid the waste of electricity invalid ,thus extend the service life of the electrical product.