Right click on your button and select About:
The following window will open:
Here you will be able to see the version of the Little Green Button software, the site ID that it is associated to and the name of the organisation that it is licensed to. The expiry date of the licence is given along with the location of this particular button.
For further information click on the Technical Info button:
Here you can see more detailed network information including the ports that the Little Green Button software is using.
If necessary you can Copy this information or Refresh.