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