Noise-cancelling microphone filters out unwanted background noise. Power switch illuminates when microphone is active. Advanced digital USB provides superior clarity with the simplicity of a single USB plug and play connection. Can be used with any computers with USB port, plug and play; automatically shielded built-in sound card microphone of computer. Frequency Response: 20Hz-16kHz Impedance: 2.2kΩ Signal-to-Noise Ratio: ≥58dB Current Consumption: Less than 500uA Sensitivity: -26dB ± 3dB (0dB = 1Pa) Directional Directionality: Omnidirectional, high-quality microphone core Plug: Computer USB Switch: Push-button Compatible with: Laptops Color: Black Material: plastic Package Contents: 1 x Mini USB Microphone Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.