Simran AC-5000 Step Up/Down Voltage Transformer Power Converter for Conversion Between 110 Volt and 220 Volts with Circuit Breaker, CE Certified, 5000 Watts, Black

I got this so I could run a 220v Singer Featherweight sewing machine off a standard 110v outlet. My husband got me the Featherweight off of Craigslist, but didn't realize at the time that it has a 220v motor. Turns out it was brought over from New Zealand and the previous owner just got a new cord and plugged it into a 220v appliance outlet to use it. Not wanting to have to use it next to my washing machine all the time, I figured a voltage converter was the way to go. This one was the most affordable one I found, and it works great. Not too big or heavy to lug around either! It won't fit in the Featherweight case though (not that I expected it to).Do note that because of the frequency difference - 220v motors (of any kind) are designed for 50hz while the US runs on 60hz - will make the motor run slightly faster. A voltage converter can't change that, so you'll just have to deal with it. For a sewing machine it totally doesn't matter, but depending on what you want to use this for you should check into how this will affect your device.

Have happily used this converter for a month with absolutely no issues. It is powered on 24/7 to run an old 220-volt Bose Acoustic Wave radio from the European market and it does it well. The converter is heavy and is not for portable use and it runs a little warm, but not hot.Don't be like me and skip reading the little pamphlet that comes with it - I couldn't understand why it didn't seem to work until I realized there is a switch in the rear of the unit to select a 220 or 110 input voltage and it was switched to the 220 volt input at the factory. D'oh!!Anyway, it works just fine and it comes with a couple of extra fuses and a European converter plug in case you need one.

Doesn't work. bought it with the thought of using. it sat in a closet for a couple of months. when attempted to use (first time) checked multiple times that the input is set on 220 V (as in my country), connected (first with a plug adapter) to live power socket, flipped the switch and nothing, no light no current nothing. Changed the plug (to have grounding) still nothing. Changed a fuse, nothing. Just a heavy ugly chunk of metal. Going to try and open it up next, hopefully not going to electrocute myselfedit: thanks to a bad screw, I had to go find something to break it off with... it has been a while since I used my Dremel :)awesome first impression when taking apart...When opened, the first thing I noticed is the fuse's disconnected wire (circled with red in one of the attached photos) and copious amounts of glue (just indicates how "good" the build quality is)... so now I need to go find a soldering iron, which I'm not sure I have. still 1 star, NOT something I would recommend!edit 2 - "let there be light": found soldering iron, connected wire, there's light after flipping switch. connected a black and decker wireless screwdriver BDCS20 to charge. will update in a while if it is more than just a lightLast update: It "works". It charged my flimsy screwdriver. I am not going to test it with anything big, nor am I going to check actual voltage.Me needing to open the BADLY BUILT thing and RE-WIRE any part in a completed product is more than enough to earn this negative stars.

We've left this on for over a month now without issues to test a firewall appliance and it just stayed luke warm and never got too hot to touch.There's a switch in the back where you can select the input voltage, either 110V or 220V. We've only used it in the US at 110V input and 220V output in the front. Please note that this is quite a bit heavier than travel transformers that are popular for temporary use.However, this transformer does not change the Hz from 50 to 60 or vice versa. In Europe, it's only 50 Hz, so this transformer can only take down the voltage to 110V but does not increase the cycles to 60 Hz. Likewise in the US, this transformer does not reduce the cycles to 50 Hz. This mainly affects devices that rely on timing such as clocks and the speed of motors.FYI...many devices like your cell phone/camera charger, laptops, and shavers are already 100-240V 50/60 Hz and usable worldwide with the appropriate $2 adapter plug. Just carefully check the label.