Update of DOWL's update of OwnlyMe's amazing Speaker Signals Expansion that works on 2.0. Just a version bump, no substantial changes.

Credits:
https://www.freevector.com/warning-symbols-vector (license: attribution required, share alike - CC BY-SA 4.0)
http://game-icons.net/lorc/originals/leeching-worm.html (license: attribution required - CC BY 3.0)
https://thenounproject.com/term/oil-rig/17478/ (license: attribution required - CC BY 3.0)
https://www.shareicon.net/gas-80053 (license: attribution required, share alike - CC BY-SA 3.0)
https://thenounproject.com/term/drilling/908128/ (license: attribution required - CC BY 3.0)

The bot and battery icons are based on those from Factorio .

The bomb and bricks icons were made by OwnlyMe.

The rest of the graphics are public domain:
https://signsanddisplays.wordpress.com/2011/01/11/35-free-warning-signs-symbols/
https://commons.wikimedia.org/wiki/Crossing_signs#/media/File:Nepal_road_sign_B40.svg
https://commons.wikimedia.org/wiki/File:Nederlands_verkeersbord_L2.svg#/media/File:Nederlands_verkeersbord_L2.svg
https://de.wikipedia.org/wiki/Datei:ISO_7010_P001.svg
https://de.wikipedia.org/wiki/Datei:ISO_7010_P002.svg
https://de.wikipedia.org/wiki/Datei:ISO_7010_P003.svg
https://de.wikipedia.org/wiki/Datei:ISO_7010_P029.svg
https://de.wikipedia.org/wiki/Datei:E011.svg
https://de.wikipedia.org/wiki/Datei:E010.svg
https://de.wikipedia.org/wiki/Datei:E003.svg
https://pixabay.com/en/chemistry-icon-laboratory-science-856929/
http://www.urltarget.com/space-shuttle-liftoff-liftoff-nasa-aerospace.html
https://publicdomainvectors.org/en/free-clipart/Radioactive-transparent-icon/63849.html
https://commons.wikimedia.org/wiki/File:Zzz_sleep.svg
https://publicdomainvectors.org/en/free-clipart/Tool-options/67662.html
https://de.wikipedia.org/wiki/Radioaktivit%C3%A4t#/media/File:ISO_7010_W003.svg

And the original mod was made by OwnlyMe.