Description Driver-free, the sound card is easy to operate and use, and is more user friendly. Designed with 3 ports, the USB external sound card is suitable for wired headsets and smartphones. Compatible with most laptops, PCs and computers, the driverless sound card is widely available. With a button for adjusting the volume, a computer USB external sound card can meet your different needs. Support one-button mute and one-button microphone off,the the sound card can make your work more convenient. Specification: Interface type: USB. Channel: 5. Model: SC1. Sound card package: Yes. Type: External. Type: USB. Sound card project: driver free USB external sound card. Special features: mute switch, volume adjustment. Support system: replacement for Windows,replacement for Mac OS,replacement for Linux. Material: ABS. Input interface: USB2.0. Output interface: microphone. Interface, 4PIN headphone for jack, headphone for jack. Signal to noise ratio: ≧80dB. Frequency range: 15Hz-25KHZ. Color: black. Size: 100*35*16mm. Microphone indicator: red light when silent Note There might be a bit color distortions due to different computer resolutions. There might be a slight errors due to different hand measurement. Package included: 1 * USB Drive Free Sound Card Kit.