store.wirelesstag.net

I have found these devices to be a cost-effective means of monitoring out 15 refrigerators and freezers. Once they are installed, there's rarely issues with reliability.

been using for years great products

I've bought several of these over the years and use them with my Hubitat to monitor various parts of the house. Reliable and simple to use.

One of the most reliable IOT device I have ever purchased. I have used abt 15 sensors of all kind for years with hardly any downtime or malfunction. Keep it up !

Wireless Sensor Tag (13-bit Temperature and Humidity) -- I use this as an open/close sensor. Love the predictable accuracy and long wireless range.