Specifications:

1. Input voltage range: DC 3.2V to 40V 

2. Output voltage range: DC 1.25V to 35V continuously adjustable voltage

3. Output current up to 3A.

How to use the module:

1. Connect the power supply (3-40V), the power indicator light is on, and the module is working normally.

2. Adjust the blue potentiometer knob (generally turn clockwise to boost, counterclockwise Step-down) and use a multimeter to monitor the output voltage until the required voltage.