Chosen Solution

I red on the internet that the PS4 v1 was working both on 220v and 110v, despite that the device was stating 220v. What about the new PS4 slim?

ALL PS4 consoles are dual voltage.

The Slim uses like the Fat an PSU with active PFC. And in all countries the same PSU is used. 110-240V AC 50 & 60 Hz. To make different PSUs for different countries is to expensive these days.