German to English Tech/Engineering Furniture / Household Appliances baby safety

Proz has many queries for Stecker but none clarified my text.

'reer' is a manufacturer that should be 'Reer', but twice now in the text it has been presented ee cummings-style (so irritating).

"In Erweiterung seines Sicherheitssortiments präsentiert reer eine „Bauart-geprüfte“ Steckdosenkappe, die in nahezu jede Steckdose passt und sich bei Bedarf mit jedem Stecker wieder entfernen lässt.

This concerns a safety cap to keep babies from sticking their fingers into a socket. I don't understand what 'mit jedem Stecker' is doing here..... Is it related to the existence, in Germany, of different types of plugs, as I understand from the Proz queries? Three-pronged, four-pronged, five-pronged? If so, I don't see how it's relevant as what is covered is the socket itself regardless of the shape or form of the prongs...