John is correct, but be aware that the method that he refers to is sort of a "user developed trick" that simply overlays visual symbols onto the map to indicate where speed cameras are.
It's not the same as having a GPSR that provides warning of speed cameras. GPSRs that were designed to provide warning of speed cameras provide both a flashing visual warning and an audible warning tone if you are approaching a speed camera.
I'm not trying to diss the trick of loading the visual markers in the older GPSRs - in its day (way back before the development of GPSRs that provided active alerts) it was a clever and elegant way of providing some basic reminder of where the cameras were - but in today's environment, with the friggin' cameras everywhere in some countries, it ain't sufficient to protect your wallet.
Michael