Supersonic 2.1 Speaker System - 16 W RMS - 50 Hz - 18 kHz - USBFeatures: Powerful Speaker System Speakers Delivers Clean, Crisp, Static-Free Sound Connect To Your Computer, MP3 or other External Devices USB & SD Inputs Allows You to Play External Audio Devices FM Radio Power: 15W + 3W x 2 (RMS) Impedance: 4 ohm Signal Noise: 75dB Power Consumption: 21W(RMS) Frequency Response: 50Hz-18Hz S/N: 75≥dB Input...