Piezo Dynamic Megaphone Pro

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3 Modes: Talk, Siren, and Whistle. Project loud and clear up to 1760 yard (one mile) sound coverage. Weatherproof high impact plastic and steel. 25 Watt Dynamic Megaphone. Energy E fficient and Ultra-Loud! What is Piezo Dynamic Technology Piezo Dynamic technology is a revolutionary technique that allows a megaphone to operate more efficiently and with less weight than ever before. Piezo Dynamic Technology utilizes full-sized diaphragms and ceramic wafers to create the full-frequency response and loudness of voice coil speakers, without the use of heavy, cumbersome magnets as in conventional megaphones, significantly reducing weight and current draw. - Audience Size: Up to 250 - Room Size: Up to 2,000 sq. ft. Show more