For delivery of Amazon I have to say nothing. That was as always top.
No sooner was the box home to you I have also tried the same. Plug into the socket and starts. Super regulated and on the smaller stages inaudible.
But in the car then gabs NEN small damper: If you load this cooler via cigarette lighter, it can no longer be controlled. Since then there was only one step. That should be vlt still noted in the description.
That, to me, however, no reason to give deductions, because even if you can not control the box in the car, you can hear them when not driving. And it can really really super cool. Even if it in the car because of the sunlight is a little warmer times, everything stays nice and cool in the box.