Booster PAC lithium jump starters are your go-to devices for all your power needs. Whether stranded with a dead battery, or working in a busy garage, the ES400 will deliver the power you need to get you going again. With 500 Peak Amps and 250 Start Assist Amps of starting power, the ES400 will start most vehicles up to V6 engines. It features several protections to make jump starting safer for the operator and the vehicle being started, including reverse polarity protection, backfeed protection, over-voltage protection, short circuit protection and over heat protection. Includes smart cable/clamp set and wall charger.