Module properties: non-isolated step-up module Input voltage: 3-34 V Output voltage: continuously adjustable (4-35 V) Output current: 2.5 A (MAX) Input current: 3 A (MAX) Module size: 49 (mm) x26 ( mm) Input mode: IN + input positive level, IN input negative The output way: OUT + output positive level, OUT output negative Setting method: right first then the input power (3-34V, multimeter between) and then monitor the output voltage and adjust turn on the potentiometer (turn clockwise buck counterclockwise boost) For the 12V output voltage: 4-35V continuously adjustable