hand with a megaphone in front of an empty blackboard

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Size: 17836px × 6336px
Location: Germany
Photo credit: © rcphotostock / Alamy / Afripics
License: Royalty Free
Model Released: Yes

Keywords: acoustic, advertising, alert, amplifier, announcement, attention, audio, authority, blackboard, blank, boss, box, broadcast, bulletin, bullhorn, business, closeup, command, communication, concept, control, copy, dirty, empty, grievances, holding, instruction, loud, loud-hailer, management, meeting, megaphone, message, organization, portable, protest, public, rally, side, sound, space, speaking, speech, sport, start, strike, text, trumpet, verbal, voice, white