The MegaVox DUAL Deluxe Package (MEGA-DP DUAL) comes with a portable public address system that is lightweight, loud, and easy to carry. It is the most reliable PA system on the market. It includes the MEGA-7500U2 speaker which comes with two built-in 16 channel wireless receivers, built-in bluetooth and your choices of two wireless mics. It also includes a MEGA-7501 companion speaker, connection cable, and two speaker stands. Every MegaVox also comes equipped with an alert siren, a wired microphone, and a convenient shoulder strap. It has a built-in rechargeable battery that runs up to 10 hours on a single charge. Use it for sports, marching bands, emergency situations, crowd control, auctions, or on the play ground.