People use Big Loudspeaker to Communicate with Audience. PR Agency Team work on Social Media Promotion. Public Relation, Digital Marketing and Media Concept. Flat Isometric Vector Illustration. Shutterstock .eps vector - People use Big Loudspeaker to Communicate with Audience. PR Agency Team work on Social Media Promotion. Public Relation, Digital Marketing and Media Concept. Flat Isometric Vector Illustration. - ID: 1545511148