The Pyle PMPRA515WHI Megaphone is a 50-watt portable bullhorn ideal for indoor and outdoor use. It features multiple audio modes, including Talk, Siren, Music, Whistle, and a 60-second recording option. With an aux input (3.5mm), you can stream MP3 and digital audio files. This megaphone also includes a built-in automatic siren for emergency situations. Its ergonomic pistol grip and lightweight design ensure comfortable, easy use, while the adjustable volume control lets you set the desired sound level. The included shoulder strap offers convenient hands-free carrying. It connects to external devices like smartphones, tablets, and iPads and runs on 8 'C' batteries (not included).