Features: There is no need to install the driver in WIN2000, WINXP, WIN3003 systems. Support ordinary speakers or earphones with microphone hole. Function: microphone recording, karaoke, headphone and speaker switching function, mixer function, output level adjustment, convert analog signal (line signal of microphone and , MP3, TV, radio recorder, etc.) into digital signal and save function . The appearance is exactly like a flash drive, light-colored transparent for shell, USB interface device, plug and for play. Also for most operation systems. 5HV2 USB 7.1 Channel External Sound card Game professional, It is a highly flexible audio interface which can be used wither with desktop or laptop systems. Specifications: Material:ABS Size: Approx.8x10cm/3.14x3.93inches Color:Black Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings. Package includes: 1x USB Sound Card