Federal Signal SS2000 siren for GTA V - as used by the LAPD in real life! As seen in real Code 3 response footage, End Of Watch etc.

Official release vid https://www.youtube.com/watch?v=SELkTSwrm7k

What you get in the pack:

~ Wail
~ Yelp
~ Pier*
~ Manual/Bullhorn

*In reality the LAPD only uses the above two but I included the pier to replace the vanilla game's one as it felt a bit empty without it.