FIG 2 illustrates a system 200 using {HEAD ~ a plurality} of {TAIL ~ devices} employing wireless communication using techniques such as reflective backscatter to provide and receive information 
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FIG 2 illustrates a system 200 using { HEAD ~ a plurality } of { TAIL ~ devices } employing wireless communication using techniques such as reflective backscatter to provide and receive information
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH