PROJECT YOUR VOICE: ThunderPower Megaphone speaker ideal for voice projection during outdoor gatherings and crowd control 3 MODES: Choose between 3 megaphone modes: talk, whistle, and siren alarm, in order to hold your audience's attention AMPLE RANGE: Enjoy ample 1200-yard range as the megaphone uses a wide bell diameter for extended projection EASY TO USE: Single-button control provides an easy-to-use and convenient user operation