Should I get a 48v power supply for my microphone?

[Picnics]

I've heard that if I'm using a desktop I don't need a 48v phantom power supply, but my mic quality is pretty bad and it's very quiet, so I'm assuming my desktop can't properly handle it? I don't know anything about microphones.
Guess I should have mentioned this but the microphone is a Floureon BM-800 Condenser microphone, in the description of the item on amazon, it states "Connecting with desktop computer, it can be used separately; But if with laptop computer, need connect to electrical outlet or use a 48V phantom power supply to make sound much clearer and higher."

 

[Gam3r01]

If you want to properly use a condenser microphone on the XLR interface you should always have phantom power.
The best choice is to get an audio mixer that has phantom power.