You can easily recognize a grounded socket by the extra (third) hole in the outlet which is dedicated to grounding. In some countries (e.g., the Netherlands), there are metal strips on the side or a metal pin that protrudes from it. Please check locally on how to recognize a grounded wall socket.With the socket tester you can check if your socket is properly grounded.You can find it at the following link:https://aarding.org/products/tester-for-socketsAlternatively, you can always ground through a pipe from your central heating. They are also always grounded via the boiler (by law).You need an extra cable with an alligator clip per earthing product:https://aarding.org/products/crocodile-cableor for several items, you can use the handy distribution box with an alligator clip:https://aarding.org/products/alligator-boxOr you can ground directly with the handy grounding pin in the ground under your bedroom window (even 1 or 2 high). The fine discrete cable then goes through the window, which closes perfectly (it follows the profile of your window):https://aarding.org/products/aardingspin-earthing-rodIf you want to ground several products (e.g., with 1 or 2 grounded pillowcases) or when you need an extra 5m cable, you can also use a distribution box with a standard pin (with the supplied plug adapter or grounding pin):https://aarding.org/products/earthing-distribution-box