3 Pack LM2596 DC to DC Voltage Regulator 4-40V to 1.5-35V Buck Converter with LED Display

[High Precision] The buck converter contains 36u thickened circuit boards, a high-Q inductance with an output LED indicator, and superior solid-state capacitors that can effectively filter out high frequency noise. Suitable for various electronic projects. [Input Voltage] DC 4V to 40V (input voltage must be 1.5V higher than the output voltage, no boost). [Output Voltage] DC 1.5V to 35V voltage is continuously adjustable, maximum output current is 3A. [Mini Size] 57*36*13 mm (with potentiometer). 3pcs included. [Easy to DIY] Connect to power source, using a mini screwdriver to increase or decrease output voltage by adjusting the screw on the blue potentiometer and monitor voltage with multimeter to get the needed voltage, clockwise to step up voltage and counterclockwise to step-down voltage.

(Factory default stays a high voltage, you need to contrarotate about 7-15 circles before the voltage starts ramping down, 1 circle means +/- 1V)