【Sturdy Shell】Thickened shell, excellent heat dissipation comes from design and materials, surface bump design + shell effectively improves heat dissipation, thickened shell, heat dissipation and compression performance are greatly improved. 【Multiple protections: The cooling fan prevents the vehicle power converter from overheating, saving power and energy. Overload protection, output short circuit protection, overheat protection, input undervoltage protection, input overvoltage protection, extend the service life of the device. 【LED Screen Display】The LED screen displays the input voltage and output voltage of the battery. Lightweight and compact, perfect for vacation, camping and business trips. It can be connected to almost any vehicle with a 12V output and provides charging options anywhere. 【Wide Application】Can be connected to car/battery/solar etc., widely used such as mobile phones, laptops, lamps, digital cameras, TVs, CD players, DVDs, electric fans, power tools, etc.