The Bigfoot Dual Package comes with the Bigfoot with built-in Bluetooth, two built-in 16 channel UHF wireless receivers with your choice of two wireless mics, and a built-in CD/MP3 combo player. The line array speaker folds down into a durable case that has wheels. It unfolds in seconds and stands about 5 feet 7 inches tall. The line array consists of five 8" neodymium woofers and one 1" neodymium high efficiency compression driver. It operates 6-8 hours on a single charge. The Bigfoot has a USB port for charging an MP3/iPod and has two universal microphone input jacks. There is no stand needed - just roll it into place. Use it at sporting events, graduations, outdoor camps, auditoriums, and more!