Writing note showing Energy Efficiency. Business concept for reduce the amount of energy required to provide product Megaphone Extending the Volume Ra

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Writing note showing Energy Efficiency. Business concept for reduce the amount of energy required to provide product Megaphone Extending the Volume Range through Space Wide Beam

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Size: 7000px × 4667px
Photo credit: © Artur Szczybylo / Alamy / Afripics
License: Royalty Free
Model Released: No

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