This DC Converter/Gang Box converts12V or 24V DC into 220V AC through which You can run SMPS based Colour TV, DVD Player, DTH Set Top Box , Wifi Router, CFL, Mobile/Laptop Charger upto (40-60)W. This Product is without Battery. You need A 12/24V Rechargeable Battery to produce 220V AC. DC Converter is used in Different Vehicles.