PylePro Model: PMP30 Compact Megaphone with Built-in SirenMegaphone PA Bullhorn with Built-in Siren, Adjustable Volume Control, and 800 Yard RangeFeatures:- For Indoor/Outdoor Use- - Over 800 Yard Range- - Adjustable Volume Control- - Used By U.S. Armed Forces- - Maximum Power Output: 30 Watt- - 2 Audio Functions: Voice & Alarm Modes- - Voice Mode: Amplifies Your Voice as Spoken into the Microphone- - Alarm Mode: Amplifies Alert/Siren Tone Through the Speaker- - Ergonomic Grip & Lightweight Chassis- - Compact & Durable with Foldable Handle- - Battery Powered: Requires 4 x D Batteries (not included)- - Dimensions: Diameter 6.25 x Length 10.0- The Pyle PMP30 Megaphone Bullhorn is compact, powerful, and portable. With each iteration of flagship megaphones, weve improved the battery life, power, and ergonomics. This model has 30 watts of power, so your voice will reach up to 800 yards away! Features include a built-in button-activated siren alarm function, adjustable volume control, convenient folding hand grip, and the durable style is even trusted and used by U.S. Armed forces. Battery powered and requires 4 x D batteries (not included). Works great indoors or outdoors.