Abstract: A tracking device and system is configured to be modular in nature and to include an interchangeable ICC (integrated circuit card) and an interchangeable power supply. The tracking device is customized for the particular application, and may be disposable. It contains componentry for determining its own location and for transmitting indications of this location in a pre-scheduled, event-driven or user query-responsive fashion to a central storage location accessible only to a properly-authenticated user. The tracking device may take any of a number of forms, including an adhesive strip containing affixable to the tracked object.