It often emits distorted air raid sirens , emergency broadcast alerts, or SAME (Specific Area Message Encoding) headers typical of weather warnings.
It gained viral fame through found-footage style videos on TikTok and YouTube, as well as various fan-made horror games, notably one by Modus Interactive released in late 2018.
It can replicate human voices , animal calls, and even music to lure victims into forests or rural areas.