The BIG-QUAD-HHHH Bigfoot Quad Package comes with the BIG2-XU4 sound system with built-in bluetooth AIR wireless transmitter & 2 dual wireless mic receivers. This unit also inclues 4 WH-LINK wireless handheld mics. The Bigfoot Line Array is the newest, biggest, and most powerful Portable Sound System on the market. Designed to cover a football field, this thunderous battery powered system is up to any challenge. With a line array consisting of five 8" neodymium speakers and one high efficiency neodymium compression driver, this bad boy packs a punch - yet easily sets up in seconds. The Bigfoot is the first Anchor Audio Portable Sound System that offers four built-in wireless receivers - allowing everyone to be involved! It also boasts standard built-in Bluetooth and an optional built-in CD/MP3 combo player to easily connect to anything you'll need for an all-inclusive sound coverage.