I also think it is something like that. At least it looks like this:IR sensor/repeater?
There are some stereo systems that included a tiny mic that you use to help calibrate their surround sound settings by placing them into the middle of the room. The system would play tones through each speaker and calibrate how to adjust its volume and EQ settings so they the "center" of the audio image would be fixed at the mic's location.
I have had great fun (particularly on this forum) with Safari's ability to translate the page on the fly.Thank you monkeyT it’s definitely an IR receiver.
The picture is identical thanks again now if I only read German.