Bluetooth Headset mic to External Speaker via Win 7 Laptop

Is it possible to get mic in from a Bluetooth headset, live play it through Laptop speakers/External USB Speakers?

I'm trying to make a mic-speaker combination which works without external power supply!

Also, are there any software which will simplify the whole process?

To me the laptop would have to be Bluetooth enabled which if it was then you could play the sound through the laptop speakers.

Adding a set of active powered speakers would then produce what you are saying on the headset.