300W 20A DC-DC Buck Converter Step Down Module Constant Current LED Driver Power Step Down Voltage Module Electrolytic Capacitor

Ok

Ok

Works 100% Radiator for 4 kW is too small!

Works well, for a battery charger over 6A, fan cooling is needed. A week later one stopped working, nothing burned out, it just stopped.

Thank you! The order took a long time, but the product fully met expectations. Well packaged, no damage. Fully corresponds to the description. Sincerely grateful

The product is full of ..... Just plugged it in, after 5 seconds the device burned out. I don't know if the seller is to blame or not. But the product itself is of very poor quality

The voltage regulator does not work, I wanted to replace it, even the new one does not work, in the absence of a resistor, it works

the module is absolutely working, but for my work I used radiators of a different size and a cooler in addition

The product is defective, it doesn't work. Voltage is not supplied to it, the switch doesn't respond. Very disappointed.

The converter is defective, it cannot handle a 3A load with a 12v input, the output drops to 10v.

I received everything, not the first to order. Thank you for the work done.

This is not the first order I have made. Thank you for the work done.

everything arrived on time. checked, everything works. great

compact working, thank you.

works flawlessly

I recommend the seller

happy with the product

The product is OK!

Great