COS is an American siren manufacturer currently manufacturing omnidirectional sirens highly inspired by the Federal Signal 2T22 and Sentry 3V8-H.
The main use for those sirens is to alert deadly weather such as tornadoes, sandstorms, etc. As the summary says, only three sirens are included in this mod, plus it was made with MCreator and blockbench
All sirens can be activated with redstone. HOWEVER, it can only do the Alert/Steady signal, Attack/Wail is currently not possible.
if you have any update ideas feel free to comment below.