Featuring piezo dynamic technology, the PMP53IN delivers high-end performance at an affordable price Click here for a larger image Comes with built-in 9v jack (adapter not included), and switch for easy transition between modes Thanks to its light-weight design and ergonomic handle, the PMP50 is easy to handle and even easier to use Professional Piezo Dynamic 50 Watts Megaphone With USB Function The PMP53IN is a power horn speaker/megaphone capable of projecting your voice in superb clarity — up to a mile! It’s perfect when you need to be heard indoors or outdoors in front of a large crowd. Get your voice to the right level with the variable volume control. Or use the built-in siren to get everyone’s attention. You can even plug in an external audio device, like an iPod or iPhone, using the 3.5mm jack. Pyle’s megaphones are built with a tough housing and are used by the U.S. Army, schools, sports coaches, and more. Requires 8 C batteries, not included. Powerful Piezo Driver and Large Bell Diameter For Projection Range Up To One Mile Built with revolutionary Piezo Dynamic Technology, the PMP50 packs a lot of power in a light-weight, easy-to-handle design. It"s much lighter than similarly-powered megaphones that use more conventional technology, and it"s powerful enough that you can be heard up to a mile. 3.5mm AUX Input Lets You Amplify Music and Recordings You can play music and recordings through the system’s powerful amplifier when you plug your iPod or other device into the unit using a 3.5mm double-sided male audio cable. 2 Modes: Talk And Siren In addition to standard talk mode, the PMP58U features a built-in siren so you can get everyone’s attention fast. Variable Volume Control Adjust the volume to your preference with the variable volume control. Ergonomic Pistol Grip And Light Weight Chasis The PMP53IN is easy to use and even easier to hold thanks to these great features.