Input Supply voltage (V) 7 ~ 40 Output voltage (V) continuously adjustable (1.25 ~ 35) Output Current (A) 8A (10A maximum) Conversion efficiency: 95% Operating frequency (kHz) 300 No-load current Typical 20mA Load regulation ± 1% Voltage Regulation ± 1% Length (mm) 65 Width (mm) 47 Height (mm) 22 How to use:  When the module output voltage cannot be adjusted (the output voltage is always equal to the input voltage) Please adjust the potentiometer counterclockwise 40 laps (400 turns) or more till it works.? Turn trimmers CLOCKWISE to INCREASE, ANTICLOCKWISE to DECREASE. When adjusting the blue potentiometer, please use a multimeter to monitor the voltage The trimmer nearest the voltage output adjusts the output CURRENT (CC) The trimmer nearest the voltage input adjusts the output VOLTAGE (CV)