1High transfer efficiency;Low interference; 2Strong adaptability and stability; 3) Overload , short circuit protection ect ... ±1VOver voltage shutdown15±1VStart blue light, working with blue light and green lightUndervoltage / Overvoltage:LED red light, ... Refrigerators, Washing Machines, Rice cookers, Travel, Camping, Medical and emergency 12v 220v 500w stable output power inverter with charger