Features 1. Free drive sound card, easy to use, help you to restore the sound function of the computer, save the dumb computer. 2. Three-hole output, with headset combo + separate headphone jack, support two people using at the same time. 3. With a volume compass, the volume is always at your fingertips and more user-friendly. 4. Made of engineered materials, this sound card is rugged and durable. 5. The signal-to-noise ratio is greater than or equal to 80dB, and the frequency response range is 15Hz - 25KHz. Specification Item Type: Sound Card Model: ORICO SC2 Product Material: Engineering Materials Input Interface: USB2.0 Output Interface: Microphone Interface, 4PIN Headset Interface, Headphone Interface Signal To Noise Ratio: >=80dB Frequency Response Range: 15Hz - 25KHz Headphone Indicator: Blue Microphone Indicator: Red, lights up when muted Other Features: Mute Switch, Volume Adjustment Support System: For Windows/Mac OS/Linux Line Length: Approx. 10cm / 3.9in Package List 1 x Sound Card 1 x Instruction Manual