This jump starter power pack will jump start any dead battery in cold season The smallest and lightest portable power with patented technology It supports 12 V vehicle jumpstart and can charge various gadgets with its built-in dual USB slots Multiple safety protection design, waterproof and dustproof Features independent on/off switch which allows the positive clamp to be connected without the risk of sparking Has integral air compressor with pressure gauge for accurately topping/pumping up tires