Koolatron 12v Auto Heater - Instant Defroster with 6 Foot Power Cord.  Product Reviews

"I bought it even I saw someone's comment about the burning plastic smell. I regretted my decision at the moment I turned it on. It is not generating warmth at the first place. Second, that smell is really really bad. They should stop making this product!!"

"It's a 12 volt heater, you are not going to get much heat from it. It doesn't blow very much, but that's expected. If it blew air faster, then it would just blow cold air as the heating coils can't get enough electricity to heat up enough to heat more air. So, just like any other 12 v heater, it's weak. It won't heat your car, but it will defrost your window a little."

"First one lasted 3 days then quit working. [...]That one never worked right out of the box. Koolatron didn't respond to my emails about the second unit. I wouldn't recommend this product, nor any other product from this company."