2 metres. If you need more detailed information about a product, it's always under "Specifications". I just found it there too.

Can be worn well when wearing glasses

On my Logitech headset (now a different model), this setting is called Sidetone and can be deactivated/set in the Logitech GHUB software.

An adapter from jack to USB is included.

I am normally a lens wearer. However, even with my glasses, I have no problem with the headphones. The G G432 completely encloses the ear. Depending on how thick the earpieces are, they are more or less bulky. But since the G G432 is very well padded, this should not be a problem even with somewhat thicker/firmer earpieces. Short answer to your question: Yes

Since Digitec does not carry them, I refer you to sites like amazon or aliexpress.

Yes, it is the same. The 7.1 is not a version number but a designation for the surround sound, as the headphones simulate 7 normal and one bass channel instead of the 2 channels in stereo or 5.1 in other surround systems. But as I said, the surround sound in these headphones is only simulated, which works quite well, because otherwise you would need 8 speakers for 7.1 surround. Like almost all other headphones, these only have 2 speakers.

Jap.

The G432 is a wired headset, which means that the headset can only be connected by cable. On a PC, this is possible with a free USB port or 3.5 mm jack plug. For consoles or mobile devices only with the 3.5 mm jack plug. I hope this answer was helpful for you Greetings xkukurusa