When you install a smart device behind a wall switch, the physical position of the switch button becomes less significant. For instance, prior to installing the smart device, the wall switch with the button in the upward position would indicate that the connected appliance was turned OFF. However, once the smart device is installed behind the wall switch, the roles of the button positions may be reversed.
This change occurs because you can now control the ON/OFF status of the device using the dedicated app on your smartphone or tablet, as well as through the wall switch connected to the device.
The intelligence of the smart device is programmed to monitor the changes in the operational state of the connected device itself, rather than focusing on the physical orientation of the wall switch.