Cover Up to 1200 Yards: Providing clear voice across large stadiums or open fields, this professional 50W megaphone can help everyone hear you through crowd noise, ideal for coaches, event organizers Multi-function Especially Bluetooth: Bulit-in strong loud siren, 240s record and audio player function, this bullhorn megaphone supports USB, SD card, AUX input and Bluetooth multiple modes Two Power Supply: Powered by a 1800mAh rechargeable battery (included) or 8 C batteries (not included), the megaphone has long-lasting use life, prevent dead battery surprises during events Portable & Ergonomic: With a detachable strap, you can carry the megaphone speaker anywhere, while the ergonomic design at the handle ensures comfortable during extended use, reduce the burden of use Instruction Manual: The bullhorn has a complete functional operation panel, focu on user friendliness. The attached instruction manual help quickly understand and use bullhorn, reducing learning time.