2 Channel input with 16 bit resolution Alternate digital filter programmed by driver to quality.Additional headphone out with selectable source and phone sense.Stereo MIC support with boost capability Recording source select from S/PDIF, MIC, Line-In and summation of MIC, line-in front channel (all channels optional) MIC, Line-in monitor from front channel (all channels optional) with volume USB Audio Device class Spec.1.0 and USB Class spec. 1.1 complaint Type:External Feature 1:3D Sound Feature 2:Embedded USB transceiver and power and reset circuit Feature 3:Earphone Plug Feature 4:Speaker Shifter Feature 5:Environment Connector a:USB 2.0 A Male Interface Type:7.1-channel audio CMI6206 Chipset USB Spec 2.0 full speed compliant SCMS (Serial Copy Management System) Complaint and Digital Audio streaming VIA S/PIF out USB remote support 8 Channel DAC output with 16 bit resolution Volume control and mute function Earphone buffer 2X interpolator for digital play back data to quality control and mute function Master volume control by default;per-channel volume control by C-Media driver Playback with soft-mute function Support 48/44.1 KHZ sampling rate for both playback and recording MCU support with two-wire serial interface Volume up/Volume down/Playback mute button LED indicator pins:operation/recording mute/SCMS protection C-Media value added software (multi-channel positional 3D sound,AC-3 encoder,) Embedded USB transceiver and power and reset circuit C-Media value added patent software driver Room Size Mode Graphic Equalizer Karaoke Function colour:black Material:ABS size:14*10*2.5cm Package Contents: 1 * Sound Card 1 * Fiber Optic Cable 1 * USB Cable 1 * CD Only the above package content, other products are not included. Note: Light 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.