The MegaVox Pro with two wireless receivers is a portable PA system and is the easiest, most reliable public address system on the market. This PA speaker has a powerful, high-efficiency re-entrant horn driver, and is designed to project your voice loud and clear. It comes with a coil cord microphone that plugs into the back, and a removable clip-on shoulder strap. The MegaVox can reach a distance of 100 yards. It has a built-in rechargeable battery that lasts up to 10 hours on a full charge, making it completely portable, and comes with a power brick charger. The back panel has a signal alert button to grab everyone's attention, and an external output to power an optional companion speaker. This PA is lightweight only 15lbs, and comes in a durable, UV treated, fade-resistant case. It can go anywhere and has even been used during hurricanes, in combat, and countries all over the world. It's best used outdoors and is great for schools, playgrounds, sports and cheer, coaches, marching bands, auctioneers, police/fire/military, crowd control, natural disasters and emergency responders. Band directors can also hook up their metronome (like a Dr. Beat) to the MegaVox during band practice, and hear it across the entire football field.