Bi-Directional Microphone, Omni-Directional Microphone, Uni-Directional Microphone Diameter (mm): 6.0 - 9.7 Height (mm): 2.2 - 5.2 Sensitivity (0dB=1V/Pa at1KHz): -44 ~ -52 db Impedance (Kohm) Max.: 2.2 Standard Power Supply (VDC): 2.0 Current Consumption (mA) Max.: 0.5 Application: Telecommunications, Audio, Toys, Hands-free, Headsets, Cellular Phones and Home Appliances