Product review (1 stars): Horrible job at regulating temperatures
My unit may be defective, but it did not regulate temperatures in my 5 cf keezer at all.  I had to set the unit to 20 degrees, and keep at the TOP of the keezer by the lid (near the top of the 10 inch color), just to get drinkable beer temps. Placing lower in keezer lead to warm beer.  One day it froze the bottom of my kegs.  I had it rigged up to work for me, but after a year I gave up and bought the ink bird controller.  I only wish I sent this unit back after I purchased rather than waiting a year and "making it work".  Not recommended at all.