Review on Gowoops 2PCS 150W Adjustable Power Voltage Step Up Boost Converter Module: DC-DC 10-32V to 12-35V by Corey Ford

I give this product 5 stars because it works as intended but read this warning before you buy: DO NOT CONNECT THIS AMPLIFIER TO YOUR PROJECT BEFORE ADJUSTING THE POTENTIOMETER. You can adjust the output voltage with the gold screw of the blue potentiometer. If you hook up the amp to your Arduino, Raspberry, or other device without first setting up and measuring the voltage, you can do what I did and fry 2 Arduinos before realizing that the amp was pre-configured to run 50 volts instead of 5 output V . said that the potentiometer allows for very precise voltage regulation, making this device very flexible for use in almost any project, and the heat generated during the boost process is almost non-existent so you don't have to worry about a thing.