The tracker device can be used to provide entity (person, pet, etc.) wearing the device an automatic means of signaling authorities in cases of emergencies/danger. The tracker device will automatically activate with a rise in body temperature or elevated stress levels. The tracker will emit a unique signal to alert authorities of the particular entity (individual, pet, etc.) that is associated with that unique tracker device. The tracker device will be capable of emitting a scent or dye that can only be removed by authority or physicians using a special solution (solution to be determined). Each tracker will be assigned a unique identifiable number (UIN) upon issuance that will be maintained in a tracker database provided to local, state, medical, federal, and national public safety agencies and recognized authorized security companies.