The PROEL's FREE10LT is a battery-powered combo sound system with a comprehensive set of functions and sound quality that you wouldn't anticipate from a product of this type. It comes with a huge LCD and remote control, as well as a multifunctional MP3 player with USB connector, SD slot, and BLUETOOTH connection. This portable PA system allow you to perform music or play sound without having to worry about where to plug in the power wire, how to connect your MP3 player, or how to position your microphone. Even better, this sound system is small in size, weatherproof PP cabinet for maximum portability and protection. So the systems can be moved anywhere because they have a retractable handle and roller wheels built in.