Artis BT800 is an Outdoor Bluetooth Trolley Speaker / PA system with Digital LED Display. This speaker is ideal for parties and large gatherings or large spaces. The 80W RMS Output with extra bass will blow you away. The wireless Mic. Can be used to sing along with music or make announcements. Additionally this speaker also has the extra features of a USB port through which you can play your music by connecting a Pen Drive, an Aux in slot to connect various other media devices, SD card reader with audio Playback & FM radio. The speaker has an inbuilt rechargeable battery.