This the feature for the inverter generators, if you want to purchase this product, you can check here 1.Pure sine wave inverter technology 2.Working with sensitive load easily 3.Portable, compact size 4.Energy saving, save oil 5.Running quietly 75db only 6.Reliable and easy starting 7.Durable and free maintenance 8.AC&DC Overload Protection 9.Power Indicator light 10.With Efficiency Mode Switch, Copyright: ECO-WORHTY ONLINE SHOP