72W Power Supply Adjustable DC 3V ~ 24V Variable Universal Switching AC/DC Adapter 100V-240V AC to DC Converter with LED Voltage Display and 14 Tips, for 3V to 24V Household Electronics - 3000mA Max

Works great with my keyboard. Ordered it for it's reverse polarity extension and it works great.

This is a great little power supply for providing various voltages to random devices you lost the charger to. I found a used camcorder at Goodwill for $5 that didn't have a power supply. I only needed it for a few weeks while I converted old family videos from High8 to digital. This had the right size barrel connector to swap into it and I dialed in the correct voltage for the camcorder. No muss. No fuss. Completed my project and now I can donate the camera back to Goodwill for someone else to use (but keep this little beauty around). One thing of note that I wish they'd improve, however: The dial is SUPER touchy. I'm talking "breath on it and it'll jump by .1V" kind of touchy. I highly recommend dialing in the voltage BEFORE you attach it to anything, as the sweep is very fast and very twitchy until you dial it in.

This thing should be in very household. If you have many electronic devices like I do, occasionally one stops working or charging. Having a versatile and adjustable power supply is a must for troubleshooting and getting a device going while you order a replacement power supply. It has many connects sizes that should fit almost every need. I will give you one WARNING. The device comes with a six-inch extension output cord that seems to have no use and does not state what it is for. Well, what it does is reverses polarity, so you should never use this unless you are sure your device has the positive power on the outside of the connector, which is very rare. Reversing polarity may fry your device! It's nice they included it, but there should be a big red label affixed to it that states what it does. I dinged it a star because the voltage potentiometer (adjustment knob), is way to sensitive and its hard to set the voltage exactly, There are no detents or click in spots for the voltages so you have to fiddle with it and hope the knob doesn't get bumped to a different voltage during regular use. Other than that, it's a keeper.

This has been great to test and replace some electrical items around the home. Monitor flashing turns out it was a power supply, so didn't have to buy a whole new monitor Quite a few connections that seem pretty decent comparability for most things. Potentiometer seems to be affected by temp a bit, but nothing more than about 0.3v.

This thing is awesome. The voltage is a little touchy, but once you get it set it's fine. I love all of the adapters that are included, and the polarity reverser is handy as can be. I measured the voltage with a Fluke meter, and it was within .05 volts. I also dialed it to 18 Volts and then connected it to a variable speed fan...I measured the wattage of the draw and at high speed it was drawing about 65 watts...it was stable.

Bought two of these to provide “plug-in” power to solar Christmas lights. The solar lights quit working, so decided to power them from AC source. These provided quick hook up and could be adjusted to the 3.2 volts necessary to run the lights. They’re priced right and are working great for me.

Thought power converter for a Christmas decoration had quit working, so ordered this one. Very hard to adjust power output, got it close. Apparently decoration has died as it still won't work. About done with you people. Out of the last 6 orders only 1 was as expected, the others were the wrong size, defective, or had no instructions included. The only thing that has worked as expected was the JVC vcr remote control. At least the basic functions work on this, which is better than not at all, which at least makes it useable. I have only ordered from you the last few orders due to where I live, in the middle of nowhere. Used to be convenient, no longer now when the received items are useless. This seems pointless to continue as this is not even close to convenient, and the items were relatively inexpensive making returning them not really worthwhile. The so called fitted spark plug wires I ordered for my 350 Chevrolet engine work as far as making the vehicle run, but now there are spark plug wires strung all over the engine compartment as most of them were way too long. Way too much not as described or no instructions. If you notice future orders are much fewer of not any at least you know why.

This power supply has been reliable for many pieces of electronics for me to test with. The Voltage tends to drift up slightly when it's used for a while, but only on the order of .1 to .2V. My unit does not get very hot, is not noisy (no audible sounds). The size is nice: some may not like that this is of the style with a box in the middle of the cable, but this does mean it doesn't take up a large space on a power strip or outlet to block other available ports.