2 Channel input with 16 bit resolutionAlternate digital filter programmed by driver to improve quality.Additional headphone out with selectable source and phone sense.Stereo MIC support with boost capabilityRecording 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 volumeUSB Audio Device class Spec.1.0 and USB Class spec. 1.1 complaintType:ExternalFeature 1:3D SoundFeature 2:Embedded USB transceiver and power and reset circuitFeature 3:Earphone PlugFeature 4:Speaker ShifterFeature 5:Environment Connector a:USB 2.0 A MaleInterface Type:7.1-channel audioCMI6206 ChipsetUSB Spec 2.0 full speed compliantSCMS (Serial Copy Management System) Complaint and Digital Audio streaming VIA S/PIF outUSB remote support8 Channel DAC output with 16 bit resolutionVolume control and mute function Earphone buffer 2X interpolator for digitalplay back data to improve qualitycontrol and mute functionMaster volume control by default;per-channel volume control by C-Media driverPlayback with soft-mute functionSupport 48/44.1 KHZ sampling rate for both playback and recordingMCU support with two-wire serial interfaceVolume up/Volume down/Playback mute buttonLED indicator pins:operation/recording mute/SCMS protectionC-Media value added software (multi-channel positional 3D sound,AC-3encoder,)Embedded USB transceiver and power and reset circuitC-Media value added patent software driverRoom Size ModeGraphic EqualizerKaraoke Functioncolour:blackMaterial:ABSsize:14*10*2.5cmPackage Contents:1 * Sound Card1 * Fiber Optic Cable1 * USB Cable1 * CDOnly 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.