Product review (4 stars): Simple and effective, dial isn't always accurate
I have collected three or four of these units over the years to control a chest freezer and mini fridges for beer making/serving. The latest such unit, I purchased from an Amazon seller.

I will say I was surprised by the accuracy of the dial on the most recent unit I bought. My others do not control the temperature to the same level indicated on the dial, so I simply keep a thermometer inside the appliance and adjust accordingly.

I know you can buy digital controllers for a little more money, but in my mind it feels like analog will be more durable -- that a digital model could fail more quickly. I could be completely making that up.

This controller comes with a rather long power cord that may be longer than you need. At any rate, the power cord to the appliance itself will need to be the same length since it plugs into the controller's plug end. The temperature probe is attached to a long metal capillary tube. At 6 feet, it's plenty longer than I ever need; the excess stays coiled up. The tube is malleable and you can kind of bend it to take whatever configuration you need.