1. An interrogator device that monitors at least one object, the device comprising: a sensor that detects when a trigger event has occurred so as to initialize interrogation for the at least one object to determine whether the at least one object is within a detectable range of the interrogator device; a controller that, when the at least one object is outside the detectable range of the interrogator device, generates a notification and, when the at least object is within the detectable range of the interrogator device, is constructed and arranged to control functionality of the at least one object; and wherein the interrogator device is constructed and arranged to store identifying data for the at least one object to determine when the at least one object is within the detectable range of the interrogator device.