The Explorer DUAL Basic Package AC Only Option (EXP-BPDUALAC) comes with a portable sound system that is small, lightweight, and easy to transport. It includes the EXP-8000U2AC speaker which comes with two built-in 16 channel wireless receivers, your 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!