Peak PKC0J6 600-Amp Jump Starter 600 amps; Sealed Lead-Acid Battery; 12 Volt outlet and 1 Amp USB Digital LED display shows: Battery life of the jump-starter and Volt meter reading of the dead vehicle battery Exclusive Low Charge Alert (LCA) - warning goes off when the jump-starter needs to be charged, like a smoke detector Reverse polarity indicator/alarm - alarm and light (if hooked up incorrectly your battery could explode) Durable high impact resistant housing; Built-in AC charger (allows you to charge with almost any extension cord)