boosting wireless headsets/mics signal with a wireless access-point

[gringotani]

I need to implement wireless headsets/mics to connect with a PC for a warehouse environment.  The PC would be running an MS Access form that would be integrated with speech recognition and text-to-speech, so the warehouse employee can input data into the MS Access form and use voice commands to execute MS Access macros.  How  can I extend the range of a 2.4ghz  wireless headset microphone with a router?

Thank you very much in advance, Nathaniel