The 55 Amp Engine Starter Boost 10 Amp 12 Volt Auto Battery Charger is a powerful charger/starter combo designed by Infinity. It features an automatic stop function, safety switch, and instant starting power for both 6V and 12V batteries. With a peak amperage of 55 Amps, this versatile tool is perfect for jump-starting engines and providing quick and efficient charging for automotive batteries. The product comes with a warranty and is a single item that includes the manufacturer part number 40119A.