I bought this for 49 Euros form Mediamarkt and will go tomorrow to return it.
The box does not cool more than 11 degrees with abmient temperature of 23, using 230 V and waiting for 2 hours. Thus the claim for delta of 15 degrees is false.
It is VERY noisy - I could hear it in the next room with colsed doors. In the car it is much louder than the car engine. You have to switch the radio on to mask it somewhat.
The advantage is that it is built from a flexible plastic.
Avoid it. Look for a cooler with brushless fans.