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So far they’ve worked flawlessly. I bought one to try then followed up with another three. So far I’m happy. I have two in my dual zone Engel Fridge/Freezer. Works equally well in the freezer and the fridge compartment. The other one is in the built in fridge in the Mack truck I drive. The fourth is a spare at the moment. I like having the widget the app provides on the home screen of my iPhone so I can keep an eye on the current temp of my fridge or freezer (several years ago I lost a weeks works of food when a fridge became unplugged in a truck I was driving). It also makes setting the cooling temperature easier in an older Waeco portable fridge I have - it doesn’t have a digital readout and the temperature slide control is pretty temperamental. Getting real-time feedback on the internal temps takes the guesswork out and puts an end to frozen lettuce and ice cube fruit.
10 months later : Ended up with 5 of these units and all are still functioning. No issues, pretty happy with them.
Devices seen to be working (I'll review them elsewhere) which is surprising given they were packaged in a box with no fill foam. The box was meant to be left 'In a safe place', but was instead stuffed into my letter box and visible to any opportunist who fancied a look. Not good enough, Amazon
These things are fantastic little temperature & humidity monitors. For the price you get great monitoring with data-logging included in the device. Bluetooth range is excellent, even when I've got them inside a fridge. The app allows you to monitor the devices and graph historical information and it's integration with iOS widgets is excellent to quickly see information from the home screen.
The only criticism I have is the app is a bit pushy on selling more of the Govee devices and getting you to sign up to their cloud stuff and is a bit cartoon-ish until you turn off the "Holiday Mode".
Other than that these are fantastic value and would buy again.