1.7.1 channel USB sound card
2.USB2.0
3.support both window and vista
4.factory price and quick delivery

7.1 channel USB external sound card

USB 2.0 3D 7.1 Audio 8 Channel Sound Box
USB Spec 2.0 full speed compliant
USB Audio Device class Spec. 1.0 and USB HID Class spec. 1.1 complaint
SCMS(Serial Copy Management System)Complaint
Dolby @ Digital Audio Streaming Via S/PIF out
USB remote wake-up support
8 Channel DAC output with 16 bit resolution Volume control and mute function
Earphone buffer 2X interpolator for digital Play back data to improve quality
2 Channel ADC input with 16 bit resolution
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(all channels optional)
MIC, Line-in monitor from front channel(all channels optional)with volume
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 HID button
LED indicator pins: Operation/recording mute/SCMS protection
C-Media value added software(multi-channel positional 3D sound, AC-3 encoder, ect. )
Embedded USB transceiver and power and reset circuit
C-Media value added patent software driver Support Vista