The Stanley FatMax 700a peak jump starter offers a convenient, portable way to jump start your battery without the need of another vehicle. With enough power to jump start your truck, jump start a car, jump start a motorcycle, jumpstart marine vehicles and more. Ideal for roadside emergency jump starts. Simply attach the clamps to the vehicle battery and if connected improperly the anti-polarity alarm will sound, alerting you to switch the clamps before turning on the unit. The jump starter features a 120 psi air compressor with easy-to-read backlit gauge to inflate tires or sports equipment. USB portable power to charge phones, tablets and other USB devices. When the unit is not in use, we recommend that the battery is charged at least every 30 days.