The Pyle PMPRA213RD Megaphone is a portable and powerful 20-watt bullhorn perfect for both indoor and outdoor use. It comes with versatile audio modes, including Talk, Siren, Music, Whistle, and a 60-second recording feature. The aux input allows you to stream MP3 and digital audio files, and it includes a built-in automatic siren alarm for emergency situations. With an ergonomic pistol grip, shoulder strap, and lightweight design, this megaphone is easy to carry and use. It connects to external devices such as smartphones, tablets, and iPads and runs on 4 'C' batteries (not included).