Easy Mounting Simply connect the speaker rail below the bottom frame of the monitor using holes for perfect fit and connect the monitor to the USB port. No tools or software driver required! Equipped the selected HP monitors with a rich sound without occupying the desk space thanks to the HP S101 speaker rail connected by the USB port, which easily fits under the device. Flexible audio connection options Enjoy the clear media sound and not only with two stereo speakers; use the line input to directly connect your phone or player to the speaker rail. The headphone socket allows listeners to listen without disturbing their colleagues.