The conversion of electricity into heat is very simple and is all about energy. There's not much you can do to make it more efficient. This just looks like a small fan heater. What is the power rating?
I've never used Temu. I am pretty wary of buying gadgets these days as a lot of them are disappointing.
That's exactly what it is. Of course there's no power rating on it hahaha. It's a cheapo knockoff product.