This part is a kind of semiconductor called WM-034C.

Function of this product has Omnidirectional Electret Condenser Microphone Cartridge.

Manufacturers : Panasonic Semiconductor

Image and pinout :

Some of the text within the PDF file :

Microphone Cartridges Omnidirectional Electret Condenser Microphone Cartridge Series: WM-034B/034DB (pin type) WM-034C/034D G Low operation voltage of 1.0V to 10V (2M-034D type) G Microphone with pins for PCB (WM-034B/034DB type) I Features G Useful for almost any type telephone and other applications I Sensitivity WM-034B/034C Vs = 4.5V RL = 2.2kΩ X Y Z –46±3dB –42±3dB –38±3dB WM-034DB/034D Vs = 1.5V RL = 1.5kΩ M H P R U –44±2dB –42±2dB –40±2dB –38±2dB –36±2dB I Specifications Sensitivity Impedance Directivity Frequency Max. operation voltage Standard operation voltage Current consumption Sensitivity reduction See next page (0dB = 1V/pA, 1kHz) Less than 2.2k Ω [1.5k Ω] Omnidirectional 20–16,000 Hz 10V 4.5V [1.5V] Max. 0.8mA [0.3m [ ... ]

WM-034C PDF Datasheet Download