300 Watts Japanese Voltage Transformers, Step Up and Down Japan Converter, can be Used in 120 Volt and 100V Countries, Convert from 120V to 100V and 100V to 120V, Universal Outlet Socket

Ok so, check it. I play a Japan based Mobile crane game called Toreba and, ended up winning a bunch of stuff up to and, including Small Appliances all of which are the Japan standard of using 100 Volts instead of the American standard of 110-120 Volts. The reason why I ended up buying a couple of the 1000 Watt rated boxes(One for the computer area and, one for the Kitchen.I'll add that story too) is because one of the many items that I had won from Toreba was a single person Sandwich Maker. you know, the kind that cuts the sandwich diagonally as it grills it. Anyway, I loved this thing and, would often take it to work with me just so I could make something quick in like 5 minutes time and, then back to it. (Lots of outdoor kind of work) But, one night I noticed that the top part wasn't heating as much and, the bottom section was scorching my bread so I knew it was probably about to out and, sure enough It quit later that night. I opened it up and, all the wiring all looked intact and, everything but, I guess the elements just burned out. So I admitted defeat and, knew that I brought this on myself because I knew that it would happen eventually, I just didn't know that it would happen that quickly (like a month and a half of use) but, I did get some fair bit of use out of it.Now for the story of the Prior-mentioned Kitchen placed box. My wife's coffee pot had stopped work properly and, she needed another one but as luck would have it, I had also won a coffee maker from Toreba as well. Again, it was a Japan standard 100 V unit. So she tried it out and, it worked great but, she mentioned to me that it was kind of difficult to turn it off at the switch(located on the back) because the unit was fairly hot to the touch. Again I chalked it up to Over-volting. I knew that I didn't want to burn out the coffee maker just as quickly as I did the Sandwich Maker so I starting looking for converters to lower the voltage and, after a little bit of searching, landed on these units here. After looking at a fair amount of the small appliances that I had won, I had see that none of the Watts had gone over 750 so I bought a couple of the 1000 Watt rated unit to give myself a little wiggle room.So after they arrived, I plugged one into the kitchen and, then her 100V coffee pot into it for her to try the next morning and, the result was instantaneous. It brewed her coffee and, she reported that the coffee pot wasn't too hot to the touch anymore to be able to turn it off. Ok cool, mission accomplished. Even now as I'm writing this, I'm using the Step down unit in tandem with a small 23cm wide electric grill 100V at my computer desk for a small meal. It really does work wonders and, was totally worth the buy. In fact, if I might even end up buying a third to take with me to work so I can use some my small appliances at work to make a quick meal and, back to it.If you have any plans of traveling to a place that has a 100V standard or you happen to have small appliances that use it, I would highly recommend this.Now, on the other hand, I haven't tested out the 120V option yet because I haven't had a reason to yet since I can just plug things into a normal outlet.Thank You for your time.

These are well designed and perfectly safe as long as you make sure you get the proper power rating!!I use these for Soviet-era, vacuum tube guitar amplifiers (like the Sovtek MIG-50 and MIG-100 amps) that blow fuses when powered by western (US/UK) AC mains. The Soviets didn’t leave any safety margins (“First we fly monkey and dog to space, they no come back. Next we send man. We pay family when he not come back”), and can’t handle the higher mains voltage.These transformers are perfect for several reasons: 1) they step down the AC mains so the amps don’t blow up, 2) they isolate the AC so you don’t get electrocuted, and 3) the transformer filters line noise (like lighting and motors) to keep the amps quiet.The 100W is perfect for the MIG-50.I added one to the MIG-50 in my friend’s studio (which gets heavy use), and not only is the amp super reliable, it sounds creamy and articulate, like these amps were meant to sound. Best bang for the buck.By the way, as an electrical engineer, I can comment on several of the negative reviews: They’re either people running high-powered appliances (like washing machines) through under-powered transformers (all the “the fuses blow” reviews, yeah, that’s what they’re for), or the reviewer doesn’t understand grounding (the enclosure is grounded, but the transformer isn’t”, yeah, that’s by design).

I live in the US but have a Japanese pressure washer so I set the input to 110 and plug it into the outlet. I have the out put set to 100. I don't even plug the pressure washer into it but as soon as I turn power on the fuse blows. The original and spare fuses all blown before I can even use it on an actual appliance. So this was wasted money going in the trash and I have to buy another converter.

Baller. This thing transforms most excellently.