Enjoy the ultimate home theater experience with with beFree Sound's 3.1 Channel Surround Sound Bluetooth Speaker System. This speaker system is sophistically designed, featuring a sleek look and smooth sound. With Bluetooth, USB, SD and FM radio capability, the system offers the best possible listening options for your enjoyment. * Unit option: 4""+2.5""*3 * Output power:20W+10W*3 * Frequency response:40Hz-20KHz; * Separation:50dB; * S/N Ration:75dB * Features: USB/SD/FM/bluetooth/Remote WARNING: This product can expose you to chemicals including BBP, which is known to the State of California to cause cancer and/or reproductive harm. For more information, go to www.P65W