Abstract: The invention encompasses a tracking label that includes a sensor module, a receiver system, and an energy module, in which the sensor module includes a sensor for collecting a data set, and a data transceiver that receives the data set from the sensor and transmits the data set to the receiver system, wherein the receiver system includes at least one of a storage module and a communications module, wherein the storage module includes a flash storage chip capable of storing the data set, wherein the storage module is further capable of transmitting the data to the communications module, wherein the communications module includes a transmitter adapted for transmitting the data set to a data reader positioned external to the tracking label, and wherein the sensor module and the receiver system are powered by the energy module that comprises a rechargeable battery and a radiofrequency energy harvester, wherein the radiofrequency energy harvester collects energy and transmits it to the rechargeable battery to rec