2 Channel ADC input with 16 bit resolution Alternate digital filter programmed by driver to improve quality. Additional headphone out with selectable source and phone jack sense.Stereo MIC support with boost capability Recording source select from S/PDIF, MIC, Line-In and summation of MIC, line-in front channel MIC, Line-in monitor from front channel with volume USB Audio Device class Spec.1.0 and USB HID Class spec. 1.1 complaint Support /, IEC60958, S/PDIF Really support hardware 7.1 channels. Can be connected to 7.1 speakers Up to 48KHz sampling rate, support 32KHz/44KHz/48KHz digital recording function Support Win98/ME/2000/XP/VISTA/ OS9.1 (only 2 channels can be used in ) Full-duplex audio stream playback and recording without PC built-in sound card USB2.0 is backward compatible with USB 1.1 Compatible with audio equipment specification V1.0 Support USB full-speed transmission specification up to 12Mbps 4 input terminals (one of which is optical input and two MIC inputs) 5 output terminals and 1 optical fiber output terminal colour:Black Material:ABS size:19.5 x 14.3 x 4.1CM Package Contents: 1 x Sound Card 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.