✬ Black Center White Star

✬- Black Center White Star, switch off (the light)
Smartphones of inhabitants from Star Emoji have the ✬ Black Center White Star symbol. That sign is used to switch off the smartphone. The most buildings of Stars have the ✬ Black Center White Star symbol on buttons to switch off the light.
In communication use star-shaped Emojis this symbol to switch off something.
Secret Service uses that sign for ex-famous Emojis who became criminal.