STANLEY J5C09 Jump Starter (500 Amps) • Desulfation technology;• 12V & USB outlets to charge personal electronics;• High-powered LED rotates 270deg ;• Reverse-polarity alarm alerts when there is an improper connection;• Power & charge indicator;• All-metal powder-coated clamps;• Built-in 120V AC charger recharges unit with standard household extension cord;• ETL listed;• 500A instant-starting power;• 1,000A peak;• 120psi compressor with backlight gauge;• Heavy-duty brass-tipped SureFit(TM) compressor nozzle securely connects to tire valve stems;