EM228 microphone too low-- no one can hear me. Any ideas???

Question edited for clarity and toss in some CAPS.

According to this, yes you can. The battery won't last long though before it needs charging.

https://www.google.com/search?q=emerson+em228+headset+for+music

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make sure that the bluetooth properly connected.
then click volume up

try changing the position of the microphone to nearer your mouth if possible.

I have a EM228 I am using both the pass codes which are 0000 and 1234 they both don't work what so ever

I couldn't find any informations about EM228, but if you've meant EM227 instead, the pairing code is '0000' (four zeros).. If its user guide happens to be missing, or, rather, you need further informations on how to pair it with your phone, feel free to download it from this location.

Please, let me know if I can help you any further.
Regards, Carlos

have tried using another microphone ? perhaps the connection in your laptop is loss or has bad connection bewteen the phone jack and the microphone plug

No. The aux audio level input is much higher than the microphone output (about 100 times). That's why when you connect the microphone at the aux input (assuming that you have the right jack adaptors) your voice can't be heared ty the speakers (in fact if you scream or speak loudly at the microphone it's possible to hear something in very low volume from the speakers). But there is a solution. If you desperetely need that function, you can buy a "microphone preamplifier", that's the way you can ask for, at your local market.
Post for any help.

Microphone should be located on the lid of laptop above the screen by the latch release button. You will see a small rectangular hole (if you have a built-in webcam it is to the left of it)

there is problem with microphone inside ur phone it need to be replaced. so better u take it to any technician.

Most microphones have a button switch or button, be sure that's not on and then check the microphone volume in Control Panel, Sounds