Klipsch KMC 3 Wireless Music System with Bluetooth, Black Premium 2.1 home/portable wireless music system with built-in subwoofer Quick, easy Bluetooth streaming from smartphones, portable music players and computers. AptX technology allows for audiophile quality streaming. Advanced DSP equalization for accurate reproduction of all music types. 130 watts of digital system power. Features dual 2" full range drivers for incredibly detailed sound and a 5.25 inch subwoofer combined with a unique, dual port system for truly deep bass 3.5mm input plays music from nearly any non-Bluetooth music source. USB input charges all smartphones and most portable music devices (cable not included). Portable long-life DC operation with 8 "D" cell batteries (not included) Remote control conveniently controls volume/mute and streaming music sources while being charged.