🔌 Efficient HiLetgo XL4015 Buck Converter: 3pcs Step-Down Modules 4~38V 1.25-36V 5A Adjustable DC-DC Step-Down Module - 96% Efficiency Review

This product is easy to install, bright and very good-looking. I am very impressed with this purchase. I would buy it again and highly recommend it

They are in no way adjustable. Whatever tension you get, you come out. no adjustment results in a change in the output voltage. Attempts to melt the joints. Just the stupid part.

Should have read the reviews, not just 4 out of 5 stars! Like many others, the units I received cannot be changed. The output voltage is the same as the input voltage no matter what. I wrote to their support but their reply was a useless JPG and a link to a YouTube search. No thank you!

I tested them as soon as I got them and to my dismay they didn't work at all. I tried turning in all directions, measured with a multimeter (actually tried 2 different ones to be sure) both ways; I even tried another buck-boost converter I had laying around to confirm what the values should look like. However, the output values for all three did not change at all. It's a waste of money and time, don't buy it. I'll update my review to reflect an alternative converter if I find one that works.