1.Fuse was built-out 2.Maximum Constant Power Start 3.Remote control 4.Loand ... )Over load(Buzzer alarm sharply)Short circuit protection, Reverse Polarity (Fuse)LED Indicator LightInverter, Fault, Power(5 levels:20%,40%.60 ... at a distance with wire control switch.Fuse was built-out: To change the blown fuse easily.ApplicationAutomobiles, RVs, Boats, tractors, trucks, Laptops ...