Review on DROK 300001 Micro LED DC-DC Digital Boost Voltage Converter Adjustable Volt Regulator Board Module Power Supply Transformer by Savoeun Ramirez

I have bought and used DROK products in the past and have always been very satisfied but this one was disappointing. It did not work with a 12 VDC x 1 amp "wall" DC power supply, and it did not work with a 12 VDC x 4 amp "brick" DC power supply. I have used DROK Boost DC/DC converters in combination with "box" type DC switching power supplies in the past and had no problems. In fact, I've written rave reviews about them. However, when I tried this DC boost converter in combination with the mentioned 12V DC power supply, it failed to increase the output voltage. The output voltage was practically the same as the input voltage. I'm not sure what's wrong with this item and I would buy from DROK again, but this particular item didn't work.