Enjoy the ultimate home theater experience with beFree Sound's 5.1 Channel Surround Sound Bluetooth Speaker System. This speaker system is designed with sophistication, 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. * 4" Amplifier x1 + 2.75" Speakers x5* Output power - 20W+5W*5* Frequency response - 40Hz-20KHz;* Separation - >=50dB;* S/N Ration - >=75dB* Features - USB/SD/FM/bluetooth/RemoteItem Dimensions - 11.00" x 21.00" x 15.50"Item Weight - 8.60lbs