Application areas: DIY mobile power supply, monitoring power supply, children's car power supply, camera power supply, vehicle power supply, communication equipment. It is suitable for occasions with strict requirements for volume and weight (such as model aircraft, etc.). Model/Name: Ultra-low DC-DC step-down module You can adjust the voltage by placing a multimeter on the output, synchronously, using a screwdriver to adjust a potentiometer. It may require careful adjustments to obtain an accurate voltage. Kindly Reminder Boards are adjustable current limiting, fixed current limit 3A. Please ensure that the module is within its operating range before using it. Please do not produce a short circuit, otherwise the board will shut down. When adjusting the parameter, please ensure that the output voltage is stable before using the module to avoid possible damage. Input Voltage: 4.5V~28V Output Voltage. : 0.8V ~ 20V Output Current: 3A (Large) Conversion Efficiency: 92% (High) Output