These machines are all synced up. At the end of the video they all light up and play music in perfect sync.
https://www.youtube.com/watch?v=WVoB...%A6%E3%83%B3ch
4 questions I need answered:
1. How does this work?
2. Does it go off during attract mode and is there any way to cancel it?
3. Can it be disabled completely?
4. What other machines are known to have this?