The Pyle PMP20 compact megaphone speaker features 2 audio projection modes, voice and a built-in siren that amplifies an emergency tone. The ergonomic design of the megaphone features a quick folding, pistol grip handle and a light weight chassis that is perfect for portability and easy storage. Powered by 4 x C batteries (not included), the megaphone has a power saving off switch. Perfect for both indoor and outdoor use. Key Features Compact megaphone featuring 2 projection modes: voice and siren Built-in siren mode that amplifies an emergency tone Battery operated, requires 4 x C batteries (not included) Ergonomic design featuring a pistol grip and light weight chassis Quick folding handle for easy storage and portability