USB external sound card. Bare board manner, visible material, compact and easy to carry. USB interface, plug and play, instead of traditional sound card (computer sound card is broken, can be a direct replacement). Analog audio signals can be output to directly drive headphones or powered speakers. No drivers in WIN2000, WINXP, WIN2003 system. Name: External sound card Chip model: CM108, external crystal oscillator. Output and input: 3.5mm green headphone socket, 3.5mm microphone socket. The USB interface, plug and play, replaces the traditional sound card. The output analog audio signal can directly drive headphones or output to active speakers. Colour:blue Material:PCB Package Contents: 2 * Sound Card Chip Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.