The Pyle PMP21BL is a compact and portable 20-watt megaphone speaker that delivers high-powered sound projection. With two modes, Voice Talking amplifies your voice, and Siren Alert provides an emergency alarm tone when needed. It features an adjustable volume control to customize sound, and its compact design makes it easy to carry. The megaphone includes a convenient folding handle for quick storage, and the ergonomic grip ensures comfort during use. Battery-operated (requires 4 'C' batteries, not included), it has an audio projection range of up to 400+ yards.