There is no speaker, but a jack output

Hello, You need to remove the two covers on the back of the screen to remove the stand, as shown in this video: https://youtu.be/yEHV0tjoXp0 Mounting on a VESA stand is simply done via the 4 screw slots on the back of the monitor.

This display has only one HDMI 1.4 port and one VGA port.

No, with the foot it is about 42cm

Moinmoin I don't need the screen to play games, but it does what it's supposed to. Colours and contrast are good and it doesn't reflect. It has an HDMI connection, which should be enough for transmission.