Get the crowd's attention at concerts, the beach and other heavily populated areas with the Pyle pmp50 professional piezo dynamic megaphone. Featuring a powerful 50W piezo driver and a large Bell diameter, it amplifies your voice cord free and with clarity to be heard for up to a mile away. The Pyle megaphone also includes a siren sound so you can quickly announce an emergency situation. The professional megaphone has variable volume control for indoor and outdoor use and is even utilized by service and armed forces personnel. It has a durable yet lightweight abs housing as well as en ergonomic pistol grip for a comfortable hold and a trigger for easy operation. A coiled-Cord hand-Held microphone is included to receive your voice for amplification. This piezo megaphone requires eight c batteries, which are sold separately. It can also plug into a vehicle's power source using a dc 12V adapter (Sold separately).