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