LIBERTY WITH CD PLAYER AND 1 WIRELESS RECEIVER INSTALLED. Perfect for outdoor and indoor events. Covers 2,000 people. AC powered. One wireless receiver built in and built-in CD Player ? placed at the base of the enclosure. When it?s on the speaker stand, it?s at eye level. Reads MP3 files. 10? neodymium driver provides increased dynamic range and it?s lightweight.USB charging port for iPod® or other music playing devices. Great for assemblies, graduations, presentations and any other activity indoor or out.