"In principle," it works ... 1

But only in principle. Inside the device is a switching overtemperature protection and a fuse in series are installed for safety reasons. The problem is that the first heating prematurely constantly off, with the result that the unit about half the time gives off heat in an hour.
In the remaining time, it cools until the temperature assurance closes again and the device switches on again. Thus, the actual (hourly) is not performance (measured) 430 W but about half.
Otherwise, the quality is pretty abysmal: self-tapping screws, inaccurate drilling, plastic ...

If such a thing should not save you.