a microphone for readily facilitating {HEAD ~ two way conversation} utilizing {TAIL ~ said cellular module}; and 
utilizing
a microphone for readily facilitating { HEAD ~ two way conversation } utilizing { TAIL ~ said cellular module } ; and
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH