A micro spectrophotometer is monolithically constructed on a silicon substrate. As a server receives data from various sources for wireless device users, it saves the data, associates it with the corresponding users, and sets flags to provide an indication of the secondary data. In particular, the metal body is formed in unidirectionally drawn configuration so as to produce low deformation resistance regions crossing the metal body. The associated circuitry is adapted to be powered by electro-magnetic radiation transmitted from a point remote from the sensor. The message waveforms can be transmitted either simultaneously, sequentially, or both ways.