Molekule Air Pro and Molekule Air have built-in hardware that do emit WiFi signals. Steps to turn off the Bluetooth and WiFi capabilities on these devices, can be found in the following articles:
How do I disable/enable WiFi from Air Pro?
How do I disable/enable Bluetooth and WiFi from Molekule Air?
Molekule Air Mini and Mini+ have built-in hardware that does emit WiFi signals. Currently, the WiFi signal cannot be disabled on Air Mini or Mini+.