Unidirectional electret condenser microphone, microphone unit. reliable quality. we can produce any according to your design.  

Unidirectional electret condenser microphone
1.Electrical Specifications:
   1.1 Operation Voltage:  2V
   1.2 Impedance:  less than or equal to 2.2KΩ
   1.3 Directivity:   Unidirectional
   1.4 Current consumption:  Max.0.5mA
   1.5 Sensitivity reduction: less or equal than 3dB Vs=2.0to1.5V
   1.6 S/N ratio:  great than or equal to 55dB

2.product feature:
   2.1very small,thin type Omni-directional microphone.
   2.2most suited to products having limited space.
   2.3To design for hign resistance to vibration.
   2.4capacitor inside.     
 
 3. Applications:
    3.1  mobile phones /tellphones
    3.2  headphones
    3.3  MP3/MP4
    3.4  PDA
    3.5  digital camera 
    3.6   talkie-talkies
    3.7   voice recorder
    3.8   acoustic control light
    3.9   voice-activated toys

If you have any question, please feel free to contact me, thank you !