Visit Amazon sites : http://www.amazon.com/gp/product/B00GMPDA9K?tag=gallianostore-20

Kanto YU2GW Powered Desktop Speakers (Gloss White)

Built-in USB DAC Digital Audio Converter
25 Watts Per Channel
2-Way Rear-Ported Powered Speaker System
Class-D Amplifier
Frequency Response 80Hz - 20kHz Amplifier Type Class D Power Handling 25Wchannel DAC Sampling Supported 16-bit48kHz Sensitivity 84 dB