Computer USB Powered Monitor Speaker Sound Bar 3.5mm Audio Wired Soundbar Speaker Converts to Vertical Desktop Speaker USB powered Stereo speakers 2 x 2.5 w RMS magnetically shielded 2.0 speakers Frequency response: 100 Hz - 20K Hz Plug Type: USB and 3.5mm Stereo jack required Two speakers can be Merge into one sound bar Frequency response: 100 Hz  20000 Hz. S/N ratio &gt; 45 dB. Powered by USB port. Plug type: USB and 3.5mm stereo jack required. Power ON/OFF. Volume control. Power LED. Merge two speakers into one sound bar.