Step down 24V to 12V 40A Car Inverter, Volume Reducer. This product is made by advanced PWM chip technology, and can work in the state of ultrasonic sound. It not only reduce the volume and weight, but also help the circuit work without noise at the same time. It shows Much smaller, lighter, quieter and more convenient. This product is designed with multiple protection to the circuit. It can protect the electrical appliance and automotive circuit effectively. When the output voltage exceeds the rated output, the product will stop working and the electrical appliance are protected.