Instructions: In the XP system plug and play automatically shield the computer built-in sound card microphone (individual computer will not be shielded only need to manually switch once) for: network chat network video conferencing network singing network recording online games Professional network microphone professional voice chat tool plug and play without any portable portable practical. Specification: 1.Size: Microphone mouth length 5cm Straightened height 13.5cm Base width 5.5cm 2. Sensitivity: -47dB ± 4dB 3. Sensitivity reduction: -3dB at 1.5V 4. Working voltage: 4.5V 5. Frequency response: 100 ~ 16kHz5. SNR: Mor e than -67dB 6. SNR: Mor e than -67dB 7. Length: 0.7-0.9M Package Including: 1 x USB Microphone Any questions please contact us thank you!