CP0085B Features Excellent sound performance Omni-directional design General Specs Model EF-269 Type Mini Microphone Color Black Sensitivity  -54±3 DB Frequency Range 100-5 KHZ Connector 3.5 mm interface Microphone Dimension 9.7 x 6.7 mm Microphone Directionality Omni-directional Compatibility All sound card Function Notebook IP phone calls and speech recognition