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I use these tags In Australia to monitor freezer & fridge temperatures. This can then be presented to health authorities to demonstrate that our produce has been kept at the correct temperatures.

It has always worked as advertised

Reliable

Outstanding product! For the life of me, I can’t understand why this is not on the shelves of every Hope Depot, Lowes, Best Buy, etc. So simple, so reliable, and so reasonably priced. It is by far the easiest, most accurate, most programable and most cost-effective way to monitor and protect your home. I use it to monitor all my doors, the temperature in my basement to ensure pipes don’t freeze, the temperature in my fridge and freezer (should I lose power) as well as critical temperature and points throughout my house and workshop. It has never failed me.

Great devices, extra durable, and reliable! Battery life is excelent.