PEAK performer. With this jump-starter in your vehicle, dead battery dread is a thing of the past. Its 350 starting amps and 700 PEAK amps help restart your car immediately should your battery run out of juice. For safety, it's equipped with a reverse polarity indicator as well as an alarm. There's also a 120 PSI air compressor, perfect if your tires need inflating. From Black & Decker.