The system 1, wherein {HEAD ~ the transmitter} is inoperable to transmit {TAIL ~ data} when the actual voltage supply level of the batter is lower than the second voltage threshold 
The system 1 , wherein { HEAD ~ the transmitter } is inoperable to transmit { TAIL ~ data } when the actual voltage supply level of the batter is lower than the second voltage threshold
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH