When you need to project clear sound up to a half-mile away, use the PA system that lives up to its name, the AmpliVox Half-Mile Hailer. The S615A half-mile Hailer loudspeaker PA system makes is it possible to be heard up to a half-mile away. Its simple straightforward controls, and lightweight design make it the most practical and portable outdoor speaker sound system on the market. This easy to use 50 Watt amp really powers out the sound, just turn it on, adjust the volume and start talking. The weather proof horn speaker produces wider sound dispersion than other available products and the handy shoulder strap frees up your hands and also lets you be seen. If you need to be heard in a large and noisy crowd this is your solution. Use this outdoor speaker sound system to direct emergency crews, alert crowds, announce sporting events or make your message heard at rallies, protests and parades.