PylePro Model : PMP35R Compact Megaphone Megaphone PA Bullhorn with Built-in Siren Record Function with 10 Second Memory Adjustable Volume Control and 800 Yard Range Features: 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 Ergonomic Pistol Grip & Lightweight Chassis Voice Mode: Amplifies Your Voice as Spoken into the Microphone Siren Mode: Amplifies Alert/Siren Tone Through the Speaker 10 Second Integrated Audio Memory Record Your Voice and Repeat the Message Battery Powered: Requires 4 x D Batteries (not included) Dimensions: Diameter 6.25 x 10.0 Length The Pyle PMP35R Megaphone Bullhorn is compact powerful and portable. With each iteration of flagship megaphones we’ve improved the battery life power and ergonomics. Features include voice recording capability with 10 second integrated audio memory that allows you to easily record your voice and repeat the message. Enjoy 30 watts of output power so the sound will reach up to 800 yards away! Also includes 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.