Product review (4 stars): Like it states in the description the lowest temp this ...
So far it has been working with no problems. Like it states in the description the lowest temp this can be set to is 38 degrees which is about what your refrigerator temp is. Would be nice if it had lock so I can lock it when the grandkids come for a visit

Update Sept 2017
If the power goes out it resets to the manufacture's setting of 58 degrees instead of the 38 degrees I have it set at. If I am out of town everything in the refrigerator gets warm if the electricity goes out. I have had to throw out some of my drinks due to this.