The invention is directed to a location tracker and auxiliary device for use with a monitoring center for tracking individuals or objects. The location tracker has position determining circuitry and first wireless circuitry that communicates position data representative of the location of the location tracker to a remote location (e.g., a monitoring station). The location tracker also has second wireless circuitry that communicates with the auxiliary device. The location tracker has at least two operational modes. The location tracker switches operational modes when communication is established between the location tracker and the auxiliary device. The auxiliary device generally has an associated auxiliary device ID and wireless circuitry that communicates the auxiliary device ID to the location tracker.