Allows the use of domestic home appliances to be used outside. Converts your car's 12V power supply to 230/240V 50Hz supply. Convenient for powering laptops, digital cameras, phones etc. USB port. Cigarette lighter socket plug. Direct battery connectors. Temperature protection. Reverse polarity protection. Overload protection. Low battery protection. Aluminium casing. Size (H)20, (W25, (D)5.5cm