The siren on the mast announces the alarm with high-pitched sounds. it is audible thanks to several rows of trumpets, amplions. variable fluctuating sounds. chemical, fire, air alarm, blue sky stock photo...

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Royalty-free licenses let you pay once to use copyrighted images and video clips in personal and commercial projects on an ongoing basis without requiring additional payments each time you use that content. It's a win-win, and it's why everything on iStock is only available royalty-free — including all Sea images and footage.

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