ZM-MIC 1 1. High Sensitivity Headphone Mic 2. 3 Mini Clips for Tidy Arrangement 3. Attractive & Compact Design - 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