USB Step UP/Down Power DC-DC 5V to 3.3V 9V 12V 24V Module Boost Buck Converter

Features: This product is a 3-5W low power USB conversion power supply module, which can only meet your low power requirements. As long as you have a mobile phone charger, USB5V adapter, you can easily output 1V to 24V adjustable voltage, power 3W; USB male or microUSB can be used as input, which is very convenient to use. The voltage regulator uses multiple turns of precision. Instructions: 1. Button The "ON" button on the left: Short press - control the output on or off, in the calibration mode to reduce the voltage or current value of a unit; Long press - long press for more than 3s to release, the digital tube is closed, press any key to restore the display. Right side "SW" button: Short press - switch between voltage, current, and wheel display; Long press - enter or exit the calibration mode, enter the calibration voltage at the display voltage interface, and calibrate the current when the display current interface enters;