they do have a 220v switch, but you should contact Oppo customer service as I do not see a 220 IEC
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There's a switch on the back. I bought my 105D when I lived in Europe and then moved to the US and changed the voltage switch. No problems. Tidal works fine. A few native apps (mine has UK specific apps like BBC) may not work but I always found the Oppo interface horrible so tried to use as little as possible.