The Pyle PMP59IR is a 50-Watt professional rechargeable megaphone. With each iteration of their flagship megaphones, Pyle has improved the battery life, power and ergonomics. The included lithium battery provides long-lasting power and saves money on batteries. Plug in your MP3 player and broadcast your digital audio or music for everyone to hear. This model has 50 watts of power, so your voice will be heard from 1200 yards away. The PMP59IR is equipped with a 10 second memory - perfect if you need to broadcast the same message repeatedly. And if you simply need to get everyone's attention, switch to the siren mode to activate a loud, powerful alarm sound. Works great for indoors or outdoors.