1. A method of notifying a user, the method comprising: transmitting a first radio frequency signal with a first wireless tag associated with a first identification, the first wireless tag including a first radio transceiver for transmitting and receiving radio frequency signals and a first controller controlling the transmission of radio frequency signals from the first radio transceiver; receiving the first radio frequency signal with an electronic device, the electronic device including a second radio transceiver for transmitting and receiving radio signals and a second controller controlling the transmission of radio frequency signals from the second radio transceiver; determining with the electronic device a position of the electronic device and a status based at least in part on a strength of the first radio frequency signal, the status indicating whether the distance between the first wireless tag and the electronic device exceeds, equals, or is less than either a predetermined distance or a predetermined range; transmitting data including the first identification, the position of the electronic device, and the status to an external device; and notifying a first user that the data has been received by the external device.