It is true that from the beginning I was somewhat skeptical about the possibility of using and operating the heater correctly. Nevertheless, I proceeded with the purchase, having seen a few positive reviews and decided to take the risk.
The result simply does not exist!!! Because I found myself in my car on some freezing days, I operated it under real conditions and unfortunately the heater does not work. It does not have the ability to produce even the slightest amount of warm air. Only the fan works, which on its own I cannot think of any use for.
For me, perhaps the worst purchase of my life!!!! Stay away......!

It will not warm up at all. Only if you have it inside the blanket in your arms. In other words, even if they give it to me as a gift, I don't want it anymore. In one word, useless

Too noisy, had to put it under the seat to be bearable. Not very hot, like a 500 watt hairdryer, warm to lukewarm air.

It cannot even heat its "cable". Completely unsuitable for a car despite having a Cinquecento