Feature: 1. [Adjustable Boost And Voltage Stabilization] Power module board is DC to DC adjustable boost and voltage stabilization power supply module board. 2. [Operating Current] Boost module continuous operating current is 3A, good ventilation and cooling conditions, the ratio of output voltage to input voltage is not greater than 3. 3. [High Power] Boost converter board is high power, 3V 5V 12V to 19V 24V 30V 36V, a small module can support so many functions, the use of good results. 4. [High Quality Material] Charger module board is made of excellent PCB material with hard and reliable texture, very durable and long service life. 5. [Easy To Operate] Power supply module is easy to operate, just follow the manual and install it to use, very convenient and fast. Specification: Item Type: Power Module Board Material: PCB Function: 3V 5V 12V to 19V 24V 30V 36V. Package List: 5 x Power Module Board Note: When you test whether the output voltage is greater than the input voltage, please adjust the potentiometer in clockwise direction, the output voltage will rise, please do not adjust this module in counterclockwise direction, it will be damaged or even damaged in the case of high input voltage.