PyleHome PMP57LIA Megaphone - 50 W Amplifier - Built-in Amplifier - USB Port - Battery Rechargeable - 16 Hour

With each iteration of flagship megaphones, we've improved the battery life, power and ergonomics. This model has 25 watts of power, so your voice will have a range of 1200 yards. Comes equipped with built-in SD & USB flash memory card readers, rechargeable lithium battery with charger, and the 3.5mm Aux-In jack allows you to connect and play your MP3, smartphone or other external device and stream audio directly through the megaphone Works great indoors and outdoors.