Seven Star1.5V, 3V, 4.5V, 6V, 7.5V, 9V, 12V DC, 500mA Regulated Universal AC to DC Converter with Multiple Connector Ends

I bought this trash can locally and it only worked properly with fresh batteries (2 D cell) which never lasted. It would then revert to opening only halfway and was a total pain. Plus the batteries were a total rip-off. The back cover says 3V, so I got this adapter, cut the plugs off the end, and stripped the wires bare (it's low voltage). I connected the positive (white stripe) to the positive spring and the negative to the other and taped them so they stayed wrapped around. I plugged it in and WHAM!! It works better than it EVER did on batteries! Plus no more wasted money on batteries and disposal. You WILL need an outlet withing about three feet or so, but the cord is fairly long. PLUS I love the adjustable voltage so if this can ever craps out, I'll do the same with the replacement!

should have trusted the other reviews saying the voltage is not what it say it is. I thought maybe only some are defective. I got one that gives 4V when selecting 1.5V. I tested it out with a voltmeter, all voltage selections are way off from what it is suppose to be. If you have a delicate appliance it will fry it.Dont get this.

Our cordless phone system in our house stopped working after a lightning storm. I was able to determine that the power adapter for the base was the only thing that was not working. I tried in vain to find an OEM power supply. I actually bought two of them, but both caused a hum on our telephone line. This regulated power supply fixed our phone system, saving me a significant amount of money (which would have been required to replace the original phone system).

After doing some research I ordered two of these to replace some accessory light batteries, 3x AAA. This is not for what these items were intended. Though they did work initially, they shortly after failed causing the lights to become useless.As this required me to cut the wires and solder the ends to the respective contacts in the battery chamber I cannot consider these poorly as I used them outside of the manufacturers intentions.

I like it for what I needed. I use it on my slot car track. For little buildings that I put around my track.

This thing is not as advertised. It outputs a voltage but it is not selectable for 1 of 7 voltages. It has no voltage regulation. The manufacturer and all intermediate sales people involved should be sued for fraud

I purchased 2 of these units even after reading other's comments and knowing that the power supply voltages are incorrect. But I need a 1.5v power source and there's not a lot of them on the market, apparently, so I thought I would give these a try. MANY THANKS to previous reviewers that clued me into the possibility of achieving 1.5v output using the 220v input voltage setting (even though I'm using the adapter in a 110v outlet). I never would have thought to try the 220v setting for fear of causing electrical problems. But it worked for me as well!My short suggestion (tldr) is:I'm cautious by nature, so I can't recommend these power supplies to anyone that doesn't have a voltage meter for setting the exact voltage that you want. You might damage/fry items you are plugging into this transformer if the volatge is too high. I've documented my observed voltages, below, if you want more background on this concern of mine.I am also concerned about the statement on the box (I have attached a photo of the box I received) "CAUTION: do not use this adaptor with appliances that require more than 500mA current." (mA stands for milliamps). The box does not show any UL certifications, but does show the "C E" symbol. So I'm not sure if exceeding the 500mA would be a fire hazard(?) or if there is a built-in limiting chip, but I suspect there is not a built-in limiting chip since there are no other statements on (and no instructions in) the box; just what is printed on the outside of the box. In my opinion, it's not worth risking a fire if you dont know the power (milli Amps) demands of your devices, so I also cannot recommend this to anyone who also does not have the means to determine the maximum power (milli Amps) demands of a device(s) they would be plugging this adapter into.But if you know what you're doing, and have measuring equipment, I think these risks are lessened.If you want to know many other details I documented, read on:Below, I've documented the interesting disparity between the voltage markings on the devices and the "click" positions for each of the units I received.Only one of my two units came with a "special key" (see photos) to turn the three yellow slotted "knobs" (input voltage, polarity, output voltage knobs), but you could also use a "standard" (flat head) screwdriver to turn them. I also checked the packing materials it came in from Amazon, and did not see any key floating around the packing materials or box. So I'm not sure what happened to the key for my second unit?Other observations #1 = The AC plug that you plug into the wall is not polarized.Other observations #2 = When you plug the AC plug in right side up (so you can read the words) the DC cord comes out the top of the unit. This is not a problem, just odd to me because I'm used to it coming out the bottom of the unit.Other observations #3 = Between the two units I received, the click stops were fairly consistent with each other in their voltage output (not that the output voltage was always correct; see below).Other observations #4 = I didn't have to use the "click stops", but can dial up just about any output voltage inbetween the lowest and highest recorded settings I recorded below, by turning the yellow dial to positions in between the "click stops". However, I also note that the voltage sometimes doesn't change at the same rate that you turn the dial inbetween click stops, so getting an exact voltage might be a little tricky. Once you stop turning the dial, it seems like the voltage holds steady, so for instance, powering the tranformer off and back on the voltage output is still the same (consistent).unit #1unit #1 AC 110v input voltage setting (in 110v outlet):(full counter clockwise position (roughly points to 1.5v setting)) measures = 4.12v*(no click) roughly pointing at 3v setting measures = 6.33v(1st clockwise click (roughly points to 4.5v setting)) measures = 8.64v(2nd clockwise click (roughly points to 6v setting)) measures = 10.85v(3rd clockwise click (roughly points to 7.5v setting)) measures = 13.04v(4th clockwise click (roughly points to 9v setting)) measures = 15.58v(5th clockwise click (roughly points to 12v setting)) measures = 21.6v(6th clockwise click (roughly points BEYOND the 12v setting)) measures = (slow drain to 0.01v)*(sometimes measures 0v and you have to advance it a little to get a voltage)unit #1 AC 220v input voltage setting (in 110v outlet):(full counter clockwise position (roughly points to 1.5v setting)) measures = 1.44v*(no click) roughly pointing at 3v setting measures = 2.55v(1st clockwise click (roughly points to 4.5v setting)) measures = 3.70v(2nd clockwise click (roughly points to 6v setting)) measures = 4.81v(3rd clockwise click (roughly points to 7.5v setting)) measures = 5.90v(4th clockwise click (roughly points to 9v setting)) measures = 7.17v(5th clockwise click (roughly points to 12v setting)) measures = 10.22v(6th clockwise click (roughly points BEYOND the 12v setting)) measures = (slow drain to 0.01v)*(sometimes measures 0v and you have to advance it a little to get a voltage)unit #2 (for comparison with unit #1)unit #2 AC 110v input voltage setting (in 110v outlet):(full counter clockwise position (roughly points to 1.5v setting)) measures = 4.08v*(no click) roughly pointing at 3v setting measures = 6.32v(1st clockwise click (roughly points to 4.5v setting)) measures = 8.67v(2nd clockwise click (roughly points to 6v setting)) measures = 10.91v(3rd clockwise click (roughly points almost to 7.5v setting)) measures = 13.10v(4th clockwise click (roughly points to inbetween 7.5v and 9v setting)) measures = 15.66v(5th clockwise click (roughly points to just past 9v setting)) measures = 21.8v(6th clockwise click (roughly points just past the 12v setting)) measures = (slow drain to 0.01v)*(sometimes measures 0v and you have to advance it a little to get a voltage)unit #2 AC 220v input voltage setting (in 110v outlet):(full counter clockwise position (roughly points to 1.5v setting)) measures = 1.44v*(no click) roughly pointing at 3v setting measures = 2.53v(1st clockwise click (roughly points to 4.5v setting)) measures = 3.68v(2nd clockwise click (roughly points to 6v setting)) measures = 4.79v(3rd clockwise click (roughly points almost to 7.5v setting)) measures = 5.90v(4th clockwise click (roughly points to inbetween 7.5v and 9v setting)) measures = 7.16v(5th clockwise click (roughly points to just past 9v setting)) measures = 10.22v(6th clockwise click (roughly points to just past the 12v setting)) measures = (slow drain to 0.01v)*(sometimes measures 0v and you have to advance it a little to get a voltage)FYI

I love the fact that it comes with various connector ends. I have shopped elsewhere and have had to return too many times the product due to the connector end not fitting properly. This one is amazing and worth the cost for the value of the product