AmpliVox S610A Public Address System - 50 W Amplifier - Built-in Amplifier - 3 Audio Line In - 200 Hour
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The Half-Mile Hailer blows away conventional megaphones with 50-watts of power. It covers crowds up to 5,000, a football field! And unlike megaphones which cover your face, the Half-Mile Hailer lets you see and be seen.