Zalman ZM-MIC1 is a highly sensitive microphone with a clip for ease of use, some high quality headsets do not have microphones and in this case Zalman have come up with an easy solution. Features:-- High Sensitivity Headphone Mic- 3 Mini Clips for Tidy Arrangement- Attractive & Compact DesignSpecification:-- Sensitivity: -40 3dB- Impedance: Max. 2.2- Standard power supply: 2.0 V DC- Current consumption: Max. 0.5 mA- Sensitivity reduction: Within-3dB at 1.5V- S/N: More than 58dB- Directivity: Omnidirectional