The high-performance USB microphone is designed for real sound reproduction, 5 meters effective distance Features its high sensitivity. Noise-cancelling, automatically shielded computer's built-in sound card microphone, 360 immersive sound, computer recording equipment available. It is the professional network microphone, professional voice chat tool which can be widely applied to chatting, MSN, KTV, online chat, Yahoo, Skype, VOIP, video conferencing network, network recording, online games and QQ etc. It has ultra small size, lightweight, elegant shape, just leave it plugged in to your laptop / notebook and then be carried anywhere. Features: The smallest USB microphone in the world. Driver free, just plug it and go in your Windows PC or for Mac. Advanced digital USB provides superior clarity with the simplicity of a single USB plug-and-play connection. Noise-cancelling microphone filters out unwanted background noise. Power switch illuminates when microphone is active. Ultra compact size, portable, conveniently leave it plugged in to your laptop. Specification: Material: ABS + Metal Color: Black Impedance: 2.2K Sensitivity: -67dBV/pBar, -47dBV/Pascal +/-4dB Sensitivity reduced: -3dB at 1.5V Working voltage: 4.5V Frequency response: 100~16kHz Signal to noise ratio: More than 67dB 8'shielded cord with USB connector. Item size: 2.2 * 1.8 * 0.5cm / 0.9 * 0.7 * 0.2in(L * W * H) Item weight: Approx. 3g / 0.1oz Package size: 13.2 * 10.7 * 1.2cm / 5.2 * 4.2 * 0.5in(L * W * H) Package weight: 17g / 0.6oz Package List: 1 * USB 2.0 Mini Microphone Note: The Package List without user manual.