VEVOR Voltage Converter Transformer, 3000W, Heavy Duty Step Up/Down Transformer, Convert from 110 Volt to 220 Volt and from 220 Volt to 110 Volt, with US Outlet EU Outlet 5V USB Port, CE Certified

This transformer is dangerous and a fire hazard. I was having lots of issues with it tripping up my fuses until I found out that it does not abide to electrical standards. When you connect the multimeter to the Neutral connection and Ground, the reading should be 0 (Zero). However, it came up as 220V! Really, really bad. I even got shocked a couple of times because the neutral wire was live!!!! This transformer should be excluded from Amazon and from all online shopping. It will kill someone someday or catch a boat/house on fire.

Provato è perfettamente funzionante. Alimenta il mio impianto audio in maniera impeccabile ( alcune casse sono da 120v di importazione americana) e questo convertitore fa egregiamente il suo lavoro!!! Consigliato L acquisto

solid, I haven't tested its maximum limit but for what I need for now, it performs well

Working well

Ok so I've had this for a few weeks and it works well. A simple unit with a good quality Toroidal Transformer and not much else. The internal connections are good, and straight forward and there is virtually no electronics inside other than the transformer. It does have a light and a USB outlet but these are not needed to make it work. So reliability and durability is good, the front meters are not totally accurate and may be off by a bit. But the power coming out is within specs. It will not clean up the power since there are no other electronics or filter circuit inside. It would be nice to have a meter showing the incoming power in addition to the the outgoing power. I dont load this thing up so I dont really have a buzz or hum that could be if you run a lot of power through it. Even then there are things that can be done to mitigate the noise. It also only has a light to tell you the incoming power is plugged in. All in all it fits my needs perfectly and is a good solid converter that is very simple and very quiet with a very little extra draw on the power to achieve the power conversion from the converter itself. So power loss because of the unit itself is almost non existent. I wish it would switch incoming power automatically rather than having to flip a switch but it keeps the cost down and reliability up. This unit is not something you would want to tote around, its heavy. But if you need reliable power conversion I can recommend this unit.