DROK Waterproof DC Buck Converter Voltage Regulator 8-22V to 1-15V 5V 12V 3A Adjustable Output Power Supply Transformer
I bought this at amazon.com to solve what I thought might be an over 12 VDC problem.
I installed this unit but was not able to adjust the voltage to 12 VDC, It was “stuck” at 11.83 VDC as per my meter. Turning the screw had no effect at all. As it turned out the problem was a faulty connector on the terminal board so I did not need this item.
I am not going to return it for refund and I am not seeking compensation from you. Just thought you would like to know as the enclosed business card suggested.
Regards,
Carl