Constructed from premium components, it has a long lifespan, a high-quality circuit, steady operation, and high efficiency. Reverse connection protection: this feature ensures that a wire won't be harmed even if it is connected in reverse. Intelligent fan control allows the fan to automatically adjust its speed based on the temperature of the radiator. Protection features include reverse connection protection, power supply voltage abnormality protection, overvoltage protection (ouP), instantaneous overpower protection (oPP), and overheating protection (otP). Numerous uses: able to test the load's actual power, measure the battery's actual capacity, etc. Include a separate four-wire voltage indicator light and support for four-wire testing in electronic load mode. Product specifications: DC12V regulated voltage (11–13V) working power supply: 0.5A minimum, if the power supply is not