（1）Wire:
   The wire:  UL1571, UL1007, UL1061, UL3302 are in common use, and we use the UL1571 most frequently.
   （2）Microphone holder: The materials is silicon rubber, in fact is SIR.
   SIR can reduce the shake, and have the fixation function in assembling process. Providing a perfect condition to the MIC.Electric Microphone holder as the following pictures: There is four triggers can make the electricity though, it is consist of metal electric granules. Connecting the microphone’s plug boards and the handset’s main board.

   （3）FPC：

Strongpoint: distortion 、lightly、resistance stabilization、 suitable Microphone holder、shockproof.

Defect: machining fine, but operated complex.

（4）、The connection of the stitch:

Strongpoint: waste little 、easily assembly、fastness、good weld .

Defect: easily inflect、difficult in designing mini production stitch.