The Liberty Basic Package AC Only Option (LIB-BPAC) includes the most popular, portable sound system on the market. The LIB-8000CU1AC speaker with a CD/MP3 Combo Player. Package also comes with one built-in 16 channel wireless receiver, optional bluetooth your choice of wireless mic, a speaker stand, and a mini cable to plug in external audio source. It is AC powered only, which means it must be plugged into a power source to run. Also, there are two universal microphone jack inputs on the back. Use it for schools, corporate events, sports, places of worship, and more!