Want to be heard? This megaphone has many additional features aside from just amplifying your voice. It has a removable mouthpiece, shoulder strap, siren, 10 second memeory record, and even a plug in for your mp3 player or smart phone to play your favourite music through the speaker! Has a rechargeable battery as well as a foldable two prong plug in. Project sound up to 1200 yds!