NGS SB 350 Speaker Set 12W 2.0 Black

PC speaker with clear sound and high power (12W peak power)
Rich stereo sound: the multimedia speakers deliver rich, balanced stereo and clear acoustics to fill the room with sound.
USB powered, no wall power required. You can connect them to any USB power source, such as the usb port of a PC or laptop
Audio input via 3.5 mm jack cable
Easy access: a single button on the front of the speakers integrates on/off and volume control functions, so you can control these 2.0 stereo speakers with a single button.
Stylish design, the speakers are made from high quality materials that ensure long life and protection against wear and tear
Microphone input
Headphone output for listening in complete privacy
Compact design: fits perfectly on either side of your computer and takes up no extra space on your desk.
"Plug & Play" installation
Magnetically shielded
High quality sound 
Peak output power: 12W (2 x 6W)
Frequency range: frequency range: 300Hz ~ 20kHz
Input power: DC 5V:
Dimensions: 78 x 90 x 165 mm
Controls: RMS: 6 W (2 x 3 W)
Microphone input
Headphone output