"Enjoy the ultimate home theater experience with befree sound's 5.1 channel surround sound Bluetooth speaker system. This speaker system is sophistication and style, featuring a sleek look and smooth sound. With Bluetooth, sub, SD and FM radio capability, the system offers the best possible listening options for your enjoyment. * 5.25" amplifier x1 +3" speaker x5* output power:30w+10w*5* frequency response:40hz-20khz, * separation:≧50db, * s/n ration:≧75db* features: USB/SD/FM/Bluetooth/remote included* 1 x subwoofer* satellite speakers x 5* audio cable* user manual* remote control* FM antenna."