XL4015 DC-DC Converter Adjustable Step-Down Module 4.0-38 V.

4.0-38V to 1.25-36V

Display with voltmeter, voltmeter error of plusmn; 0.1V, range 4 ~ 48V. (Note: the input voltage is lower than 4V, the on-board voltage display table does not work)
• Mass 5 * 5 Press the button to switch between measuring input or output voltage, and has a light show measured on the final voltage. The initial default digital input voltage at power up and the input indicator IN light up; one push of a button, the output voltage of the digital display and the output OUT indicator light up. And to keep the last set, even turn off
• Voltmeter can be turned off, press the switch more than one second and less than 4 seconds, you can let go. After voltmeter switch closed as long as short press to open a voltmeter.
• The input and output voltage measurement error than the standard function, press the switch more than 4 seconds, release after entering the voltage measurement error than the standard functions, this time ON lights up (calibration input), the digital display flashes compared to a positive value (factory parameters 0.0), then press the button to change the value (value in the range -0.5 to 0.5, the unit is V), a positive number indicates upward calibration, negative numb