The Pyle PMP50 Megaphone Bullhorn is powerful and portable. With each iteration of flagship megaphones, we've improved the battery life, power, and ergonomics. This model has 50 watts of power, so your voice will reach up to 1,200 yards away! Features includes built-in siren alarm function, adjustable volume control and DC 12V power supply connector jack. The durable hand-grip style PA bullhorn is even trusted and used by U.S. Armed forces. Battery powered and requires 8 x 'C' batteries (not included). Works great indoors or outdoors.