The Liberty DUAL Deluxe Package AC Only includes the most popular, portable sound system on the market. Package includes the LIB-8000CU2AC speaker with a CD/MP3 Combo Player, and you also get one LIB-8001 companion speaker. The package comes with the companion speaker, two built-in 16 channel wireless receivers, your choices of two wireless mics, two speaker stands, a connection cable, 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!