This GoveeLife Smart Thermometer R1 Lite is in essentially brand new open box condition. I won it as a prize and tested it out to see how it works, but I don't really have a use for it. Its main use is as a refrigerator/freezer/aquarium alarm. You can set a temperature where you want it to alert you and it'll warn you if it goes above or below. You can also see a history of the temperature fluctuations over the last day, week, month, etc. It seems very accurate from my tests.

There is one plug that goes into a wall and connects to your WiFi, and then two remote sensors with strong magnets on their back powered by AA batteries (that say they last up to 2 years), with long probe wires that you can wire inside your fridge or freezer or wherever you want to monitor temperature.