... amplifier 4.For PC,MP3,MP4 and notebook 5.OEM,Factory Cool Design Apple Model apple shaped mini speaker USB cable for laptops Dynamic Modern Sound System 2.0 Channel Multimedia Speaker Features:1.Accompanying Speaker for PC,MP3,MP4 ... with distinct tone levels;7.Small sized design,easy to take. Specification:1.Output:RMS 3W+3W2.S/N Ratio:65dB Isolated3 ...