Invert DC 12V to AC 220 ( Maximum: 230 ) . Reliable power a variety of household AC products, such as portable stereos, laptop computers, camcorders and mobile phones etc. Protect the electrical and automotive circuits in use . Intelligent cooling fan system, CPU microprocessor to realize multiple protection . It will automatically shut down in the event of short-circuits, low .battery power, DC input voltage overload, DC output voltage overload and excessive temperature . LED display shows DC and AC voltage . Adopting aluminum alloy case, antioxidant, sturdy and .