1、This is a non‑isolated boost step‑down constant voltage/current (CC/CV) converter module. 2、Conversion efficiency is 80%. The higher the output voltage, the higher the efficiency. 3、Output voltage is continuous adjustable from 1.25‑25V by rotating the potentiometer. 4、With indicators to show the working status the module. 5、This module can only boost voltage but not power. Item Type: DC-DC Boost Step-Down Voltage Converter Module Input Voltage: 4-35V Output Voltage: 1.25-25V Continuously Adjustable Adjusting Method: First connect the input power supply correctly, then monitor the output voltage with a multimeter and adjust the potentiometer (generally turn clockwise to boost, turn counterclockwise to step-down)Output Current: 12V to 5V Maximum 2A (Output other voltage, calculate the current according to 15W, formula 15/output voltage = output current) Output Power: Maximum 15W (If more than 15W, please enhance heat dissipation) Conversion Efficiency: 80% (the higher the output voltage, the higher the efficiency) Operating Temperature: -40℃ ~ +85℃ (If ambient temperature is more than 40℃, please lower power use, or enhance heat dissipation) 1 x DC-DC Boost Buck Converter