Don’t be limited by a power adapter‎,‎ Genius releases cute mini speakers‎,‎ SP‎- whose power is supplied through a USB port from a desktop/notebook‎.‎ They use 50mm speaker drivers for loud and clear sound performance for a total of 1.5 watts RMS‎.‎ Four glossy front covers to choose from‎:‎ shiny black‎,‎ sapphire blue‎,‎ ruby red‎,‎ or grass white‎.‎ It has a convenient knob on the side to adjust the volume‎.‎ Just insert the USB plug to a PC/notebook for power and the 3.5mm audio plug into music playback device‎,‎ such as a PC‎,‎ notebook‎,‎ MP3 or CD player and enjoy music with the SP‎-

Specifications

• RMS ‎(‎Watts‎)‎‎:‎ 1 Watt
• Driver Unit‎-Satellite‎:‎ 50 x 50 mm‎,‎ 8 ohm
• Signal‎-to‎-Noise Ratio‎:‎ 80dB
• Frequency Response‎:‎ 200 Hz~18K Hz
• Power Source‎:‎ USB
• Volume Control‎:‎ Yes
• Headphone Jack‎:‎ Yes