rts Virtual 7.1 Dual USB Sound Card Rts (Radhey Techno Services)   Color : Black    Product Description:   Dual headphone and microphone interfaces.   Two little LED lights to display working stations.   The microphone recording function.   Karaoke function.   Dynamic rotating sound field.   Multichannel technology to realize the 7. 1 channel of dynamic sound.   Speaker and headphone mode switch function freedom.   Simulation speaker position-free adjustment function.   Sound Mixer function.   Output level adjustment.   Put analogue signal (microphone and CD, MP3, TV, radio line signal) into digital signals and preserve function.   Real USB Plug & Play.   Drive 2CH speakers Directly & support 3D positional sound and virtual 5. 1 CH sound track.   Use USB port power Directly.   External power adapter NO NEED.   Support the common speakers or headset, with two pairs of microphone holes.   Function keys: Microphone mute, speaker, mute.  Double mute switch button: the microphone mute buttons and sound output mute buttons.   Lovable with special appearance.    Warranty:   2 Year Warranty with Rts (Radhey Techno Services).