Its a wireless temperature monitoring system or remote temperature monitoring system. Its a product which you can use to measure the temperature of a location from a remote area through your mobile device.
Tutorials and blogs
Nowadays, most of the temperature measuring modules are in such a way that, we will have to go near to the device to measure the temperature. But, in most context, location where we have to measure the temperature will be loathsome locations, where it will not be easy to go recurringly. But, if we are using this module, we don't need to go near to the temperature measuring module. We can get the temperature reading in the mobile device over WiFi.