VEVOR 2000VA Auto Variable Voltage Transformer, 15.3 Amp, 110V Input 0-130V Output AC Voltage Regulator Power Supply, with 4 Extra Fuses Thermal Control Switch for Home Industrial Office

Performance is normal and provides safety on power up for electric projects.This thing will outlive me for sure.

The transformer arrived on time and was well packaged. However.... due to the shipping company mishandling/dropping/bashing the package.... it was damaged upon delivery. There was a bashed-in dent on the side of the box which tore the cardboard and punched through the solid Styrofoam, snug fitting, packaging and into the side of the transformer. I contacted the seller the day of delivery with pictures of the damage. WITHOUT HESITATION!, the seller goes to make it right. The sellers response was prompt and professional. They offered, instead of incurring the high return shipping costs, to refund me all but 20 dollars of the purchase price and allow me to keep the damaged unit. I accepted this offer. I had to disassemble the transformer and pop out the dented housing which caused minor paint damage. The dent was so deep that the side of the housing contacted the toroidal coil inside and chipped/gouged into the insulating varnish on the copper windings. I just touched up the gouge and re-dipped the entire core in varnish after masking the bare track where the sweep brushes make contact. I also reflowed all the solder joints and applied insulating compound to each one. I added a 20 amp ceramic slow blow fuse and holder inside the front panel which protects the load/output since the unit only came with a standard fast blow 20 amp fuse on the input side of the transformer. This upgrade has already saved me multiple times! The digital voltage guage is accurate enough for most all of my needs. When I really need big power, I swap in say 50 amp fuses and this unit handles it fine for short runs! I've had this girl practically smoking with no harm done! Adding an external fan for forced air cooling is a big help when overdriving a variable. The biggest wear factor especially when over driving a unit like this is the brushes which are not only cheap and available, but easy to replace. The core itself is rather tough and can easily handle over its 20 amp rating for brief periods! Just ensure your brushes don't start glowing!! I'm VERY HAPPY WITH THIS PRODUCT AND THIS SELLER! I will buy from them again, as I already want at least 2 more of these little beauties! 5 stars.

It works exactly as it should but just do yourself a favor and ignore the gauge/wheel on top that shows the output voltage. This gauge is useless since it doesn't take into consideration the voltage from the source (your wall socket). If your original voltage ranges from lets say 114v to 123, the output will vary at the same wheel position. So just use the front display, it is close enough. I measured the accuracy of the front LCD display with a digital multi-meter and at times it was off a little, but it was OK. The meter was SLIGHTLY higher than the variac from about 0-70v. It was the same from about 70-110v, and the variac measured higher than the multi-meter from 110-140v. Since there are toe parallel receptacles, you can monitor the output with both the display and a separate meter, but they are close enough to where I don't think it will matter. I measured the voltage in my house at 121.6v at a location, then I dialed in 121.6v on my multimeter attached to the variac. The multimeter measured 121.6v while the variac measured 124. Some other voltage readings I took are: (Meter/Variac), 30/28, 50/48, 70/69. 80/80, 90/90, 100/100, 110/112, 120/122, 130/133. The highest readings I got were 143.8/147v. So, overall I'm happy with the accuracy, the build is heavy, all metal, with simple, cheap electronics inside, but for less than $100 you get what you pay for. Be gentle on the wheel up top, as the device is heavy and you will instinctually go to grab the up, but that's the weakest part. Grab/hold it from the bottom or side. Some might say this is cheap, and it probably is, compared to a Staco but this is a fraction of the price and it only needs to do ONE JOB, and it does that job. Just ignore the top wheel gauge. It's useless. It shouldn't even be there since there's a front LCD display. In fact, they should remove it, and use this 'savings' to add a metal handle to the top. If this broke, I would want to know why. If it were my fault, I would buy this again, but it craps out on me, I will look out for a used Staco with two jacks.

Line cord should be on the rear.

This voltage regulator is built like a tank. Made to last a lifetime. Very precise regulation, awesome product.

Cheap crap it held up for 2 weeks before it fried itself for no reason! Don't waist your money or time!

I purchased this after reading some of the other reviews... knowing full-well that it may be a compromise. We'll... it is, but for occasional use, I will say it's ok.I am an Electronics Tech, and I have a rare need for one of these, but I did not want to spend a small fortune on one.Some things to expect: The build quality is not the best. Before I used it, I let my curiosity (as a Technician) get the best of me, and I opened the unit to check the wiring quality. EEEEEK!! The unit was obviously assembled by someone racing the clock. The wiring/soldering was bordering on dangerous. I took the time to correct sloppy wiring and soldering. Now I feel MUCH better about using the device.In addition, the dial and front-panel LCD meter are not accurate... especially until you get into the upper range of voltages. I used a high-quality meter to determine the inaccuracies... then used a personal labeler to make the corrections on the dial. I won't rely on the front panel LCD meter in most cases, although it does seem to be pretty accurate up in the "Normal" 110--120 VAC range.I then tested the unit, and it does perform as it should. I would NOT recommend leaving it unattended when using it, especially with higher current levels. (I use a separate meter with a "clamp-on" AC Current sensor. This unit DOES NOT have a "current" meter... only "voltage."

Works great for working on guitar amplifiers

No pense que lo fuera a usar tanto. Se convirtio en parte importante en mi laboratorio para proyectos de CA y como regulador de algunos sistemas.

item as described. have not had a chance to use yet.

I bought this to control the speed of a large fan- Seems to work well, though I've used it only a few times

product arrived seriously damaged, although the packaging seemed to be intact. I didn't want to risk plugging it in. On a positive note, returning it was easy.

Me ayudó a controlar intermitencia que estresaba mi No-break