The Liberty DUAL Basic Package includes the most popular, portable sound system on the market. Package come with two built-in 16 channel wireless receivers, 1 Handheld Wireless mic - 1 Lavalier Wireless Mic, CD/MP3 Combo Player a speaker stand, and a mini cable to plug in an external audio source. It has a built-in rechargeable battery that lasts 6-8 hours on a singe charge. There is a charging LED bar indicator, and two universal microphone jack inputs on the back. Use it for schools, corporate events, sports, places of worship, and more!