Pyle Pro Professional Dynamic Megaphone with Recording Detachable Microphone White. S Army Schools And More For Indoor/Outdoor Use Variable Volume Control Tough Housing Built-In Siren Operates by Rechargeable Batteries Included or 6 X D Batteries (Not Included) Dimensions: Diameter 8'' X Length 13 1/8'' Features of Pyle Pro Professional Dynamic Megaphone w/ Recording Detachable Microphone: Powers Up to 40 Watts 10 Second Integrated Audio Memory Replay and Recording Audio Function 1000 Yard Range Used By U.S Army Schools And More For Indoor/Outdoor Use Variable Volume Control Tough Housing Built-In Siren Operates by Rechargeable Batteries Included or 6 X D Batteries (Not Included) Dimensions: Diameter 8'' X Length 13 1/8'' Package Contents: Pyle Pro Professional Dynamic Megaphone w/ Recording Detachable Microphone Pyle PMP45R: Pro Professional Dynamic Megaphone with Recording Detachable Microphone White