Don’t be limited by a power adapter, Genius releases SP-U110, stereo speakers whose power is supplied through a USB port from a PC/notebook. You can use SP-U110 just about anywhere with your notebook or PC. Just insert the USB plug to a PC/notebook for power and the 3.5mm audio plug into music playback devices, such as PC, notebook, MP3 or CD player. SP-U110 is a compact design with good and clear sound. It has a convenient knob on the side to adjust the volume. For more information, contact your local sales representative.