PylePro Model : PMP57LIA PORTABLE MEGAPHONE WITH USB/SD READERS MEGAPHONE BULLHORN WITH USB/SD READERS, AUX (3.5MM) JACK, BUILT-IN RECHARGEABLE BATTERY, SIREN ALARM MODE Features: * (3) Audio Function Modes: Talk, Siren, USB/SD Memory Playback * Built-in USB Flash & SD Memory Card Readers * MP3 Digital Audio File Playback * Convenient Wired Handheld Microphone * Ergonomic Pistol Grip and Light-Weight Chassis * Built-in Rechargeable Lithium Battery * *or Battery Powered by (8) x "C" Type Batteries, Not Included * Aux (3.5mm) Input Connector Jack * Connect & Stream Audio from External Devices * (Works with MP3 Players, Smartphones, Tablets, etc.) * Used by U.S. Armed Forces * For Indoor/Outdoor Use What's in the Box: * Megaphone Speaker * Removable Rechargeable Battery Technical Specs: * Power Output: 50 Watt MAX * Projection Distance: Up to 1,200 Square Yards * Rechargeable Battery: 11.V Lithium, 1500mAh * Unit Size: Diameter 9.5'', Length 13.8'' -inches The Pyle Megaphone Speaker provides versatile audio projection with power and portability. With each iteration of flagship megaphones, Pyle has improved the battery life, power and speaker ergonomics. USB Flash Drive and SD Memory Card Readers allow for MP3 digital audio file projection and Aux (3.5mm) input jack provides direct connect and stream ability from external devices. An impressive 50 watt MAX power output, allows your sound to travel distances up to 1,200 square yards. Additional megaphone features include built-in button activated siren alarm, side panel touch button controls, along with a built-in rechargeable battery for wireless sound projection and portability (optionally battery powered, requires (8) x 'C' batteries, not included). Enjoy hassle-free vocal and audio projection with the Pyle PMP57LIA Portable Megaphone Speaker System.