speaker system 1.Frequency response: 80Hz-20KHz 2.Supply voltage: 5V 1A 3.Output power: 3W*1 4.Distortion: 0.3% New model multimedia speaker system -Feature:1) Support micro sd card (TF card ) 2) Can play the usb music directly 3) FM Radio with double atenna 4) Plastic shell 5) size 50X50X52mm6) Fantastic color LED flash light 7) connect with TV, cell phone , mp3 ipod Iphone as speaker ...