400 Peak/700 Instant Amp Jump-starter starts most vehicles in seconds. 120 PSI Digital Air compressor (w/ auto shut off) and Sure Fit™ nozzle to inflate vehicle tires and sports equipment. Metal powder coated clamps for durability. Alternator Check to test your vehicle's alternator. Built-in AC charger so you never lose your charger again--just plug in to an extension cord. Reverse polarity alarm warns user if connected improperly. Dual USB Charging Ports (up to 3.1A combined) charge up to 2 personal devices on the goHeavy-duty welding cables help deliver all the power with easier connection. Onboard cable and clamp storage keeps clamps safely stored. ETL Certified. Safety testing to UL standards.