The Mains wiring is different in many countries.
Europe 230V 50Hz
UK 240V 50Hz
Canada 115V 60Hz
Brazil 120V 60Hz/2420V 60Hz
Japan 100V 50Hz/110V 50Hz
etc
So how does the system control these different voltages and dim then correctly?
Also, there are many countries that have Line/Neutral wiring and not the split phase wiring of the USA! Are there different configurations of controllers/switches to deal with these issues (a 110V 100W bulb has twice the current to switch an a 220V 100W, and a fixed one time will give a different brightness when controlling 50Hz compared to 60Hz).
I am not talking of the power supply to the wireless bridge which has an external power supply, or any other similar PSU. I mean the item that actually switches on/off the lights? Does it automatically adjust to the mains voltage/frequency? What is the PF correction for the controllers?