Product review (5 stars): Yep, monitors temperatures.
We use this to measure temps inside our RV fridge and freezer, inside the RV cabin, and outside (under an awning protected from weather). Would prefer that the sensors are weatherproof so we don't have to hide the outside sensor from rain, but it works fine as long as you keep it dry. We like also like that you can easily calibrate the sensors so they are mutually consistent in their readings.