This is a car battery jump starter compatible with both 12V and 24V systems. This product is a portable power device for starting an engine when the battery is dead. Key Features: Compatible Voltage: Supports both 12V and 24V systems, making it suitable for a wide range of vehicles, from passenger cars to large trucks and heavy machinery. Functionality: Equipped with a "forced start" function that can start the engine even if the battery is completely discharged. Applications: Suitable for general passenger cars, as well as ATVs, SUVs, motorcycles, boats, agricultural machinery, and heavy equipment. Other Features: Some models include USB output ports. Safety: Uses lithium-ion batteries, making it lightweight, and is equipped with safety protection features such as reverse connection protection. Useful as a preparedness measure for emergencies.