Superconducting liquid electric heaters are all lies. The principle of this kind of thing is very simple, that is, it conducts heat faster. Because it conducts heat faster, it cools faster. This kind of thing is not energy-saving after use. , and it is easy to leak liquid. As for the lack of trademarks you mentioned, it means that these are just some individuals who have just applied for patents and are producing and selling them at home. There are certainly no various electrical certification standards, which means that they only have patents and are not produced and sold. The certification is not protected by law. In other words, there is no guarantee of safety when using this kind of thing.