... color indicators display power and fault status7.Protections:short circuit, overload, over temperature, low battery voltage, over battery voltage, lack ... , 230V, 240V3.Frequency: 50Hz, 60Hz, 50Hz/60Hz(having frequency switch)4.Socket types: USA, Australia, universal, UK, France, Germany and so ... saving fluorescent, incandescent, small television sets, car refrigerator, etc.Socket types:Waveform figure: