DROK Waterproof DC Buck Converter Voltage Regulator 8-22V to 3-15V 5V 12V 3A Adjustable Output Power Supply Transformer Step-Down Volt Module Board for Car Auto Vehicle Motor Regulated SR

Use is for 5v dash cam with LiFePO3 battery in parking mode. Replaced another brand DC buck converter that had a handy LED readout but also a 0.4w parasitic draw. This DROK has no detectable draw when powered up. Maintained a rock steady 5.00 vdc output when tested with 12.0 through 13.7 vdc input.Another benefit to this design is the stout build. The other DC buck converters are "very fragile". I will be surprised if this ever fails. DROK products have not failed me yet.

Works great as expected the only issue with these converters are voltage switch sometimes faulty. It’s always best idea to buy two of them at same time. In my case the first one didn’t worked as excepted but the other one exceeding my expectations on voltage setup after having nightmares with the first. I still gives 5 stars because that switch is so tiny and it’s a tricky area where when you apply unwanted pressure on the voltage regulator screw, there might be a chance of damage happening to the voltage setup infrastructure. So it might be possible either way one from manufacture defective or got worn out due to extra pressure applied on the screw.

Is waterproofHas 4 wiresConverts one voltage to anotherAdjustable voltage output (potentiometer)Is reasonably safeVery cost effectiveSmall and lightweightLiterally exactly what I needed to adapt 14V to 5V

They show two,I only got one.but it worked for my application

Worked just like it should , no problems.

I purchased 4 of these for an application in my RV for devices that I could not verify their ability to handle up to 14.4 volts. Prior to installation I connected these to a variable power supply and measured output with a bench multimeter. after some trial and error I realized that the output voltage was entirely dependent on load (voltage adjustment made only a negligable difference in output voltage), suggesting that this a purely analog device, depending on a feedback loop. Based on this I connected my load - a Formuler media reciever. I was able to adjust the power supply to 12 volts output on the bench, however, after a short period of time in the actual application the voltaged dropped below 10 volts, shutting off the device. Basically this is a piece of Junk - total of 4 of these devices wasted about 4 hours of my time while on a camping trip - missed the game, pissed off the wife and in general cemented my resolve to never buy anything from this company again.

Exactly as described. Easy to install.

Although the pictures show 2 units, you are only buying 1 unit.I don't know yet if it works, I haven't tried it out yet.