Peak 300 Amp Jump Starter is safer to use, store and transport than traditional jump start methods. Makes conventional jumper cables obsolete and no host vehicle is required. Perfect for cars, trucks, boats, RVs, motorcycles, snowmobiles and even lawn mowers. Provides 12 volt DC power to run/charge cell phones, work lights, radios, pda's, laptops and many other DC powered accessories. Includes built-in 12 volt DC accessory receptacle, polarity indicator for added safety, battery status check button, charging/status LED button, keyless on/off safety switch, high-impact rubberized housing, 120 volt air conditioner wall charger, 12 volt DC charger for use with cigarette lighter outlet.