That's why I didn't order one. I couldn't find any certification.
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I am considering buying one, but not putting a load through it. It seems like it should be mostly harmless as just a button controller? And running it at 120V instead of 240V probably will help as well.
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Most probable problem may happen with the built-in device power supply. From the other side, load control is a relay. It also may fail but will not create a BIG disaster such as burning internal PS.