| http://www.w3.org/ns/prov#value | - the circuitry includes a backscatter transmitter configured to provide a backscatter signal to identify the device in response to an interrogation signal; the push on and push off switch is configured to control whether the circuitry provides the signal to identify the device by controlling whether the receiver is on or off, and further comprising: receiver circuitry in the housing, coupled to the
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