25-watt megaphone features an LED charge status indicator to prevent unexpected battery depletion during use. Talk, Siren and Whistle modes deliver up to a one-mile sound coverage. Volume/gain knob gives you precise control over the sound. Pistol grip handle is angled for comfortable handling during prolonged periods. Battery-operated design requires eight C-size batteries (sold separately). Megaphone is perfect for use by event organizers, law enforcement, traffic control, marine environments and more..