I assume that this is the 305P model with a European plug-in power supply. (ES = European Socket or European plug-in power supply).
In any case, I received this model with a European 2-pin plug-in power supply unit that can also be used in Switzerland.

...it's been quite a while since I bought these switches. I only remember that it was not possible to add the suffix "300PES" to the compact version (a few cm narrower).