Bought this for my motorhome as seals had decayed on my old noisy,bulky and inefficient 3 way fridge which I had only used on a few occasions as it took as awful long time to get things cold ,was very finicky about being absolutely level and drained battery's or propane fast. This cooler is the 'polar' opposite , straight from the box (with all leads supplied) I powered it up on 12v and put 4 cans of drink in at room temperature , 30 minutes later the drinks were at 2c ,with very little noise and my solar controller showing it to be using 43w ,the insulation seem sufficient enough to turn the power off overnight.I have since found that it will hold 18 x 440ml cider cans although my daughter tells me that I can also use it for other things like milk , butter , cheese etc. I seriously can not fault this thing ,except maybe the blue colour as it does not fit in with my grey decor.