15-Inch Rechargeable Bluetooth is an all in one portable Public Address system. Built-in amplifier operating from either the mains or via rechargeable 8 hour battery powering a main driver and compression driven horn unit. Included with the speaker is two handheld microphones with inputs for additional microphones. There is also a remote control so you can remotely choose your music, control the volume and play/pause. Having a built in Bluetooth receiver and USB -SD-FM media player, means you have several ways to play your media. There is a carry handle and wheels for easy transport.