What are these devices outside my patio door?
The one on the left is a remote thermohydrometer. It reads the air temperature and humidity and transmits the data to a weather station.

The one on the right could be a similar device, or else a short-range transmitter that repeats one of your utility meters so the meter man can read it from his van as he drives by.

You should do a network search (eg Google) for the words written on the device.