SHNITPWR 3V ~ 24V 3A 72W Power Supply Adjustable DC 3V 5V 6V 9V 12V 15V 16V 18V 19V 20V 24V Variable Universal AC/DC Adapter 100V-240V AC to DC Converter with 14 Tips 5.5x2.5mm 4.0x1.7mm 3.5x1.35mm

It does what you want and does it very well, but also gives you so much more for the money you pay. There are plenty of advantages over your standard Wall Wort type Power adapter, among which are: You get a digital display that shows the DC voltage output value, which is also what you use to set the desired output voltage level. The potentiometer is very smooth and not too tight, such that it's easy to achieve the actual voltage value you need. The output voltage is accurate to what is displayed on the display of the power adapter, and also it's easier to use than many of the standard AC/DC power adapters in that you have a long cord that gives you a nice tight plug to use to plug into the outlet verses several other Power Adapters on the market what contain the transformer within the plug that you plug into the outlet source. The vast and large selection of adapters that are included with the power adapter also mean that this is a multipurpose Power Adapter that you can use with several different devices requiring many different plugs. This means you only need one adapter rather than one for each device, or you have one adapter that works across several other devices. As long as you specify the correct amperage sufficient to operate all your different DC devices, you only have to make one purchase rather than many different ones.

This is great use around the house so many think needed charger with different plugs.This worked out great. Also can change the voltage to your need.

I bought two of these units. Their price was a bit higher than other units, but I wanted to see how well (useful) the LED readout worked and the large tuning knob. I also like the higher output amperage (power) to price ratio. And they received good ratings from many amazon users. My short suggestion (tldr) is: I'm cautious by nature, so I can only cautiously recommend these power supplies to people that don't have a voltage meter for checking the voltage that you want especially if the device you're powering is voltage sensitive. I tried two of these units and got some results that varied a little between the two (detailed, below). I've documented my observed voltages and anomalies, below, if you want more background on this concern of mine. But if you know what you're doing, and have measuring equipment, I think these risks are lessened. I haven't decided if I will keep them yet or not. Having my own volt meter, the RED LED readout on these units is a little redundant for me, but could occasionally come in handy if I remember about how far each unit is off from readout voltages. I will ponder. If you want to know other observations and details I documented, read on: * These power supply units have a very basic instruction manual. But at least they have instructions! * The instruction manual covers the topic of output polarity and the use of the polarity reversing cable (not an extension cable). * It takes several seconds after turning on before the readout lights up. And several seconds after you turn it off to stop delivering power (with no load attached). This is not a bad thing. Just an observation. This is also briefly mentioned in the instruction manual. * It seemed to me like the higher the voltage, the harder it is (the touchier the knob) to dial in the exact voltage you want. I found that when I needed ultra fine control, I could place my thumb on top of the knob (instead of grabbing the knob with thumb and index finger on the sides of the know), and have a little more control over minuscule movements to dial in the exact voltage I wanted. In truth, being 0.1 volts off isn't going to hurt most devices too much. * Having the knob be so touchy and easy to turn means that it will have to be used in a location where it wont be accidentally bumped / moved by pets / people. * Of my two units, the first one tested much closer to actual, indicated voltages, whereas the second unit was delivering noticeably higher .2v-.3v than built-in LED was indicating. I've listed voltages I observed in both units below. It's interesting to me the differences in voltage outputs between the two units. Of course the instruction manual covers this situation by stating that you should use a voltmeter to double check actual output voltages if you need finely tuned (accurate) voltage. * Sometimes, after setting and then not touching the knob for a short period, the built-in indicated LED voltage would wander a little bit. +/- ~0.1v. That's not horrible. * I'm disappointed that neither unit could deliver an actual 3.00v. Some 3v devices, like LEDs, are sensitive enough that 3.3-3.4v is too high. I'll have to go with a different power source for these applications. * These units have a 3-prong grounded AC plug (good). * Housing is firm, rectangular (plastic) with mounting brackets on either long end of the power supply. * I was pleased at the amount of different tips that came with the unit, although I probably wont be using most of them as I have a specific purpose in mind, but I like having the variety available to me in case I did need them in the future. I kind of wish they sold a unit without tips to save a couple of bucks, but I realize that's probably not feasible for market demand. * Their method of reversing the polarity is quite unique (to me). I am used to the old method of a switch on the unit to reverse the polarity, but instead, they're supplying a short connector wire that you can install in between the device and your tip that will reverse the polarity at the tip. Seems like a better method, to me, once you are aware that is what it is for. * I am concerned for others by the USB nature of this power supply; there are two included USB tips you can use: One male USB micro B and One male USB-C. However, no instructions I could find tell users that the 5v setting should be used for the USB tips. It would be unfortunate to accidentally select the wrong (higher) voltage when using the USB tips on a USB device. * I am pleased to see assurances of safety features on the box: "over voltage protection", "over-current protection", "short-circuit protection", "over-temperature protection", "fire-retardant outer shell", "Anti-EMI interference", but I dont have the resources to test that these are true. * Construction seems sturdy. I did not notice any defects. But I'm also not going to be stressing this unit. My output voltage observations: Unit #1 3.29v LED readout => 3.26v voltmeter 4.50v LED readout => 4.50v voltmeter 6.00v LED readout => 6.01v voltmeter 7.51v LED readout => 7.52v voltmeter 9.00v LED readout => 9.03v voltmeter 10.5v LED readout => 10.54v voltmeter 12.0v LED readout => 12.03v voltmeter 13.5v LED readout => 13.53v voltmeter 15.0v LED readout => 15.04v voltmeter 16.5v LED readout => 16.52v voltmeter 18.0v LED readout => 18.02v voltmeter 19.5v LED readout => 19.51v voltmeter 21.0v LED readout => 21.0v voltmeter 22.5v LED readout => 22.5v voltmeter 24.0v LED readout => 24.0v voltmeter 24.5v LED readout => 24.4v voltmeter (24.5 is maximum for this unit) Unit #2 3.38v LED readout => 3.40v voltmeter 4.52v LED readout => 4.58v voltmeter 6.01v LED readout => 6.09v voltmeter 7.51v LED readout => 7.62v voltmeter 9.02v LED readout => 9.15v voltmeter 10.5v LED readout => 10.69v voltmeter 12.0v LED readout => 12.22v voltmeter 13.5v LED readout => 13.81v voltmeter 15.0v LED readout => 15.26v voltmeter 16.5v LED readout => 16.82v voltmeter 18.0v LED readout => 18.24v voltmeter 19.5v LED readout => 19.78v voltmeter 21.0v LED readout => 21.3v voltmeter 22.5v LED readout => 22.8v voltmeter 24.0v LED readout => 24.2v voltmeter (24.0 is maximum for this unit) FYI

I bought this for my aquarium light. It has worked as expected for the past two weeks. The adjustable voltage feature is nice if I want to use the power supply for something else in the future.

This is a compact variable DC power supply. It has a digital display of the output voltage which is accurate to 2 decimal places. The power supply comes with a variety of adapters to fit many DC input connectors. It also has an adapter for bare wires, which is what I am using. The nob to adjust the voltage is very sensitive, it doesn't take very much movement to change the voltage by a tenth or so, so dialing in the desired voltage requires care. Once set, the power supply seems to be very stable over a 50-degree temperature range. I am using the power supply in an unheated outdoor shed and temperature has gone down to the high teens so far this winter. I am very pleased with the quality of this device considering it's very reasonable price.

Me gustó que puede usarse para varias entradas eléctricas. Lo necesitaba por un juguete que llegó sin eliminador de corriente. Gracias

Works great as a replacement for outdoor speakers

منتج ممتاز جدا انصح فيه، تقدر تغير فرق الجهد على احتياجك، انا استخدمه في شحن بطارية ليثيوم و ايضا جهاز قص الفلين، بالنسبة ليا له عدة استخدامات و لا لقيت افضل منه في السوق.

It's very good and sensitive, but I wanted 3 volts, but it doesn't have anything less than 3.3 volts.

Esta Fuente está funcionando a la perfección. Se las recomiendo mucho.