2000 Watt Voltage Converter Transformer - Heavy Duty Step Up/Down AC 110V/120V/220V/240V Power Converter - Circuit Breaker Protection – DC 5V USB Port - CE Certified [3-Year Warranty]

Got this to run a 220v 600 watt melting pot. It puts out more than enough power and runs great. Small amount of buzzing but not enough to be annoying.

Ordered this 500 Watt transformer to use an appliance from Korea in the U.S.A. Per the manufacturer, I computed the amount of wattage needed for the appliance and then doubled it. So for example, I computed that my appliance required 210 watts, so I doubled to 420 and rounded up. The appliance I have (from Korea) didn't specify the wattage using "Watt" or "W", but instead said "VA". I believe this is the same or equivalent, but you should check with a qualified electrician if this is the case with your appliance. If your unit shows just Amp or Voltage, you can multiply the two to arrive at Wattage. Again, check with someone who is qualified before using the appliance or ordering a unit so you can ensure you get the correct wattage. My calculations worked well and the appliance has functioned without problems under constant load the entire time without issues at the selected wattage. My understanding is that you'll want to double the wattage due to changes in the flow of electricity and the appliance's peak demands that could exceed the normal wattage used or identified on the back of the appliance. Be careful for laser printers or microwaves (and other high wattage appliances), I believe that can have peak watt use of much greater than their rated wattage. I believe the rule of thumb is to multiply by 3 instead of 2 to arrive at the wattage of transformer you will need. If you live in a country that has inconsistent power delivery, you may consider purchasing a separate unit that regulates the voltage. Some transformers have this built in, but this one does not. If you will be using this transformer in the U.S.A. on a modern electrical circuit, you probably do not need a regulator. I did not purchase one and have had no trouble in the month of so that I've used the unit.The transformer does get warm to the touch, but does not get hot. I expect to unplug and turn off this transformer during vacations and while away from the home for a long period of time, but I believe that this should function well under constant load indefinitely. When you plug in, make sure you select the correct voltage on the back as the removable plug should represent the SOURCE voltage of the electricity that you will be plugging the transformer INTO. In my case, I was using a 220V appliance in the U.S.A. (110V) so I selected 110V on the back and plugged the appliance into the 220V plug on the front. For some reason, I found this a bit confusing so make sure you read the instructions included with the unit.This transformer comes with a quality plug converted for U.S. style plugs (110V) to the European/Asian style (220V) which is useful if you travel internationally and have a dual 110/220V appliance (like cell phones, laptops, etc.). It may come in helpful if you need to convert plugs for the appliance you'll be using with the transformer. In general, the unit feels like it's well made and will be able to withstand a long period of consistent use. The transformer I received was cosmetically damaged during shipment (one corner bent and a few scratches). However I'm hiding this transformer behind some kitchen items so it's not a beauty contest. The unit held up well to shipment and I didn't think the scratches and bent corner warranted a return.As far as the value of the unit is concerned, I'm very pleased with the purchase. This unit appears to be quality and will last quite a while. It was less expensive than similar units and was available for delivery with Amazon Prime. The unit includes a 3-year warranty. With this transformer being used under a constant load 24/7 almost every day, I'm comfortable that all the quality issues with the unit should come out in the first 3 years. Overall: good value, quality unit, and fast free delivery with Amazon Prime. Recommended!

I purchased two of the 500-watt version of this transformer in order to step down the 230V from the grid to 110/120V for use with U.S. appliances overseas.The transformers appear to be well constructed, although one arrived slightly damaged (the case was bent on one side, probably from being dropped or rammed into something during shipping). As some other reviewers have noted, at unpacking they do have a chemical odor. Based on a manufacturer reply to another review, this is probably some sort of thermal/conductive paste or gel that is applied to the product for operational reasons. Personally I do not think the odor is overpowering, and I do not notice it more than a few inches away from the product. The prongs on the U.S. plug were bent slightly inward, but this was easy to fix, and I was able to plug it into the 2-prong Shucko adapter that is included with the product.On the rear of the transformer, there is a plug/fuse that you place into the correct input voltage for your region. The options for foreign voltages are 240V, 220V or 200V; there is no option for 230V input. At first, I started with 240V to see how that would perform. I plugged the transformer in and turned it on using the switch on the front of the transformer. As measured by a digital multimeter, with 230V input and the 240V input voltage selected on the rear of the device, the output voltage was roughly 105V - not enough. I turned the transformer off and switched to the 220V input voltage; this gave me an output voltage of approximately 110V - good. Based on this finding, I recommend that you verify the output voltage is what you want it to be before you plug your expensive whatever into this device.On a serious note, DO NOT plug a surge protector built for 120V or any device that is sensitive to electrical polarity into a transformer stepping down 220 without first checking that the output polarity is correct. The way an autotransformer works is that the live (or hot) from the electrical outlet is stepped down to 110/120; the neutral is passed straight through the transformer because the neutral *should not* have any voltage on it. The problem is that in most of Europe, they do not use polarized plugs, which means that you have a 50/50 chance of plugging the transformer into the wall socket correctly. If you plug it in backwards, and live and neutral are reversed, the output side (the 120V outlet of the transformer) will have 120V on live (hot) and 220V on neutral. For most things, this may not cause an issue as the voltage (potential difference across) is still 110V. However, it may cause serious issues for surge protectors and other devices that are sensitive to reverse polarity.Make sure you purchase the appropriate wattage of transformer for what you are going to be using it with. Leave plenty of margin between the wattage of your equipment and the advertised capacity of the transformer.The transformers have been in continuous operation since I received them, and so far they appear to be working well. For the price, these appear to be an excellent value. I will update my review if something changes.