A very flexible portable PA system for many applications. The 15" driver and powerful internal amplifier will give adequate power for events and presentations. The internal rechargeable battery gives complete portability, the wheels and pull out handle make the system easy to move. Two radio microphones are included in the set(PP3 batterys sold separately), plus you can add two wired microphones or guitar if needed. An internal MP3 player can provide music via SD card, USB stick or connect a Bluetooth enabled device. You can connect an external player via stereo RCA line inputs. The small internal mixer allows you to mix music with the microphones, so you have a complete system in one box.