This Professional Megaphone/Bullhorn with siren from Pyle Pro is the ideal accessory to make your voice heard! This powerful handheld megaphone can be heard up to 800 feet away, plus it has a built in siren! Used by the US Army, Navy, Air Force and Marines, the PYLPMP30 has 30 watts of output power and it's built with a tough housing to withstand a lot of use. This lightweight megaphone weighs just over a pound, so its great for a number of activities.