The Snap-on 12V Lead-Acid Engine Starter+, No. EEJP600, features a smart digital display to indicate internal battery percent of charge, DC voltage, plus vehicle battery voltage, and an integrated USB port provides phone charging capability. The EEJP600 offers 350 (290 cold) cranking amps and tough 2-gauge 100-percent copper wire to create strength and durability. A safety override switch is used to ensure technicians are ready to start vehicles with battery voltage less than 1.5V DC. The EEJP600 prevents operation if clamps are connected in reverse polarity, keeping technicians safe.