Specificantions:
Sensitivity: from subzero 49db to subzero 43db
Directivity: Omnidirectional,Output Impedance is 2200 Ohm
S/N Ratio:more than 58dB

competitive priceDiameter: 3.0mm, 4.0mm, 6.0mm,9.7mm 
Height : 1.1mm, 1.2mm,  1.3mm,  1.5.mm,   2.2mm,  2.7mm,  5.0mm,  6.5mm

Advantages:

we are professional audio products for many years and We own semi-conductor room and anechoic chamber;

We could provide customized  microphone for you. Like add capacitor, resistance and so on;

Prompt delivery;