The Bluestream DJSP1516LBT is the perfect solution for tailgating, indoor/outdoor gatherings, and any other event where you need great room-filling sound. The 15-inch powered speaker delivers 2300 watts of sound with excellent bass and dynamic range. The speaker can be powered indoors by a normal electrical outlet, or you can take the music outside and use the built-in rechargeable battery. Play music wirelessly from your smartphone or other Bluetooth device, or connect your favorite audio component using the AUX input. The DJSP1516LBT also features a USB Input, microSD card slot, and built-in FM radio.