If you are stranded on the road with a dead car battery, the Stanley Professional Power Station is an all in one solution. It combines jump starting power, a 120 PSI air compressor with Autostop™ feature and portable USB power. With the heavy-duty cables and clamps, you can jumpstart your battery without the need for another vehicle. It even has a powerful 3-LED area light so you can see and work in the pitch dark. The Stanley Professional Power Station has four USB ports to charge up tablets, phones and most USB devices on the go. The compressor fills vehicle tires, bicycle tires and sports equipment with ease. This jump-starter even has the ability to check for potential alternator issues. Features Handle/roll bar Negative (-) black clamp Air hose and Sure Fit® Nozzle Positive (+) red clamp USB power button Compressor power button Compressor pressure control button (+) Backlit LCD screen Battery status button Alternator check button Jump starter power switch Area light power button LED area light Compressor pressure control button (-) USB ports Lower USB power/fault indicators Upper USB power/fault indicators Built-in 120 volt AC charger (under protective cover) Storage compartment cover Storage compartment Nozzle adapter