The professional, high output megaphone has an effective audible distance of up to 500 m. Due to a very high +SPL, the megaphone is only suitable for outdoor use or very large indoor areas. Featuring detachable anti-feedback microphone, volume control, on/off switch, shoulder strap and includes siren, whistle and fog horn. Made from high grade ABS plastics. Powered using 10 x C cell batteries (not supplied) or via a 12 V DC input.