The explorer dual basic package AC only option (EBP-7500DualAC) comes with a portable sound system that is small, lightweight and easy to transport. It includes the EXP-7500U2AC speaker which comes with two built-in 16 channel wireless receivers, choices of two wireless microphones and a speaker stand. It is AC powered only, which means it must be plugged into a power source to run. It has two universal microphone jack inputs on the back, a voice over music ducking feature. Use it at schools, sporting events, corporate events, places of worship and more.