I personally bought a Vivanco wall mount (art. no. 13015786) which fits perfectly. I have searched on different websites, all of them indicate 200x200mm and from memory it seems impossible that it is 100x100.

Good morning Claudio, concerning the EU/US power adapter I would advise you to buy an adapter (EU socket > US) and the best solution Galaxus if you search with "current adapter" you will find several models or in any electronic shop, (I do not recommend changing the socket) regards Francesco

It switches on again

A screen is considered "high definition" (HD) if it has a resolution of at least 1280 x 720 pixels. This is the case here, the TV can display 1366 x 768 pixels natively. There are also higher HD resolutions, such as Full HD (1920 x 1080 pixels, often referred to as 1080p) and Ultra HD (3840 x 2160 pixels, also known as 4K).

If you mean internet capability, the answer is clearly no. The TV has neither Wi-Fi nor an Internet connection. For this price, that is hardly to be expected. The operation of the device is very simple, I bought it for an elderly person, for which it is perfect. The weak point (as with probably all devices in this price range) is the sound, but if you run the TV over an external sound system, everything is fine.

No.