I use a third controller for my fridge that will tell you something. However, every replacement I order has been updated and improved and lasts longer than the previous one. It has a large digital display. A good thick rubber spool? or plastic? kind. Continuous. Very easy to use even without knowledge of electronics. Keeps my chest temperature exactly in the selected range. The simplicity, affordability and extremely low power consumption of the entire system (temperature controller plus freezer) even convinced my husband that our next fridge would be a freezer too.
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