Pyle Pro Megaphone with Siren Talk USB SD Card White. S Armed Forces For Indoor/Outdoor Use Maximum Power Output: 50 Watt 10 Seconds Integrated Audio Memory Built-in SD & USB Flash Memory Card Readers Ergonomic Pistol Grip and Light-Weight Chassis Rechargeable Lithium Battery (Charger Included) Battery Powered by 8 x "C" Type Batteries Not Included 6 Audio Functions Including Talk Siren & USB/SD Modes Comes with Lithium Rechargeable Battery - Lasts up to 16 Hours Plug in MP3 Players or External Devices to the 3.5mm Aux-In Jack Dimensions: Diameter 9.44'' x Length 13.77'' 1200 Yard Range Features of Pyle Pro Megaphone w/ Siren Talk USB SD Card: Used by U.S Armed Forces For Indoor/Outdoor Use Maximum Power Output: 50 Watt 10 Seconds Integrated Audio Memory Built-in SD & USB Flash Memory Card Readers Ergonomic Pistol Grip and Light-Weight Chassis Rechargeable Lithium Battery (Charger Included) Battery Powered by 8 x "C" Type Batteries Not Included 6 Audio Functions Including Talk Siren & USB/SD Modes Comes with Lithium Rechargeable Battery - Lasts up to 16 Hours Plug in MP3 Players or External Devices to the 3.5mm Aux-In Jack Dimensions: Diameter 9.44'' x Length 13.77'' 1200 Yard Range Package Contents: Pyle Pro Megaphone w/ Siren Talk USB SD Card Pyle PMP57LIA: Pro Megaphone with Siren Talk USB SD Card White