I got few Ques to ask, any1 can help me?

Helo, is that the wireless microphone is a transmitter?
If i build a wireless microphone, is that i also need to build a receiver?

Yes, most wireless mics are small FM transmitter/receiver systems, although some new ones use spread spectrum. Some info:
http://www.cybercollege.com/tvp040.htm

Hi, you got any info teach us how to build a wireless microphone with a reaceiver? Thx

Do you want to build a simple hobby project, or a commercial system?

I don't know much about commercial systems, but hobby projects commonly use a simple transmitter circuit and an ordinary FM radio receiver. Here's one that I found with Google:
http://web.telia.com/~u85920178/tx/bug.htm

Hi echo47,
Firstly thx for ur help. Yes, i m doing this is for my hobby project.
Then how about the receiver part? You have any info that teach us to build it one? Is that any FM receiver will match with the Microphone that inside the h**p://web.telia.com/~u85920178/tx/bug.htm (u giving me 1)?
Thx.

In most cases these "bug" projects use normal 88-108MHz frequency range and can be received on any radio receiver, pocket, car, home ..
This one from your link can be received at 106MHz.
So you don't need to worry about receiver. Just grab any radio with FM band ..
Regards,
IanP

Hi IanP,
Actually i want build the wireless microphone and its receiver myself. You got any info that was teaching us how to build a receiver?
Emm, 1 important thing forgot to ask.
**The microphone that like above one is can received by any FM receiver rite?
So that mean isn't it also can "disturb" the people that have FM receiver in the range?
How to let the receiver just can only received my wireless microphone signal (RF signal) only?
Thx.

Here is a simple project on FM receiver (with detailed description):
http://www.somerset.net/arm/fm_only_...tor_radio.html

You can "tune" both thr transmitter and the receiver to slightly higher frequency, say, just above 108MHz, and because it has only ≈100m range you shouldn't have problems with your local radio-authorities ..
Regards,
IanP

Hi IanP and echo47,
Thx for yours infomation. I will try to build it out.
If i having some problem i ask for yours help again ok?
Thx.