details of retro police car with a megaphone and flashing blue siren light mounted on yellow top.

alarm alert announce announcement attention blue bullhorn car city closeup communication danger details device emergency equipment flashing hailer horn information lamp light loud loudhailer loudhailers loudspeaker loudspeakers mega megaphone message mounted news noise object patrol phone police problem public rescue retro safety security signal siren sound soviet speak speaker street system top traffic urgency vintage volume warning yellow