Takes 12V DC from a vehicle's battery and converts it to 230V AC. Used with appliances that have 3 pin UK - type plugs. Fitted with a USB port for charging mobile devices this makes the chargers flexibility ideal for use in caravans, boats, HGVs etc. For safeguarding appliances, the unit is fitted with an overload alarm and reverse polarity protection. Display packed. Input voltage:12V DC, Output wattage:200W continuous power, Max wattage:400W (peak power), Output voltage:230V AC, Wave form:modified sine