radio reception means, driven by a first power supply voltage, for receiving {TAIL ~ radio carrier waves} and identifying {HEAD ~ a unique call signal} conveyed by said radio carrier waves 
radio reception means , driven by a first power supply voltage , for receiving { TAIL ~ radio carrier waves } and identifying { HEAD ~ a unique call signal } conveyed by said radio carrier waves
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH