The Die Hard Battery Charger & Jump Starter is a portable unit designed for automotive use. With a 12V voltage output, it is perfect for jump-starting vehicles. The single item features a durable construction and easy portability, making it a convenient tool to have in your vehicle for emergencies. Although it does not come with a warranty, the Die Hard brand is known for its reliability and quality. The manufacturer part number 200.71230 ensures that you are getting the right product for your automotive needs.