External power adapter NO NEED
Include Xear 3D,the virtual 7.1 channel sound effect
LED indicators: 
Microphone-Mute States, Activity
Compliant with USB 2.0 Full-Speed (12Mbps) Specification
Easy to use, No drivers required, Plug and Play
System Requirement: Windows 98 / 2000 / xp / Win7/Win8
Length:18.5cm/7.29" (Approx)
Color: White
Packet Including:
1 x USB Sound Card