The GOOLOO GP4000 is a powerful 4000A jump starter that can quickly start all gasoline engines and diesel engines up to 10.0L, even with very low battery voltage using the BOOST function. It works with most 12V vehicles and also serves as a high-capacity portable power bank with dual USB outputs and a USB-C port. A full charge can jump-start vehicles over 60 times, making it ideal for emergencies. Built with multiple safety protections, durable metal clamps, rugged housing, and a built-in flashlight, it performs reliably in extreme temperatures. The package includes smart jumper cables, charging accessories, a storage case, and warranty support.