1. This is a 12V to 3V, 3.3V, 3.7V, 5V, 6V, 9V 3A DC to DC converter power supply voltage converter buck step down module. It can convert 12V or 24V input voltage to 5V output voltage with a 3A current, which is suitable for car use. 2. The DC to DC converter module has the function of step down, converting higher input voltages like 12V and 24V to multiple lower output voltages including 3V, 3.3V, 3.7V, 5V, 6V, 9V, providing versatile power supply options. 3. With a 3A output current capacity, it can supply sufficient power for various devices that require different voltage levels. The buck step down design ensures stable voltage conversion. 4. Specifically designed for car applications, this converter can handle the electrical requirements in a vehicle environment, converting the car's 12V or 24V power source to the desired lower voltages. 5. It serves as a reliable power supply voltage converter, allowing you to power devices with different voltage needs from a single 12V or 24V input source, making it a convenient solution for automotive electronics.