V8 sound card professional noise reduction technology: built-in dual DSP noise reduction chips and ECHO, the sound card voice changer has dual DSP noise reduction chips inside, to avoid the influence of current noise, ensure high-quality sound, and sing beautiful songs. Reverb (ECHO) makes your sound more charming. Just plug the USB microphone into your computer port and high quality desktop recording is made easy, it even works automatically with your mac or pc. No driver required. Foldable design, easy to carry. Technical Specifications Output Impedance: 30% ohm +/- Microphone Output Interface: 3.5 mm Signal-to-Noise Ratio: 78 dBmeters Frequency Response: 20Hz-16kHz Load Impedance: Over-ohm Current: 3 mA maximum clamp value. Component Thickness: 45mm Sensitivity: -38dB +/- 2dB Equivalent Noise: