Abstract: The invention proposes a trackable device locally incorporating an electronic identifier comprising an integrated circuit which includes a memory and an antenna, and which is able to exchange data with a read and/or write device which is spaced at a maximum by a first predetermined communication distance. A second antenna which is able to communicate without electric contact, in particular with the identifier, is arranged at a distance from the identifier smaller than or equal to the first predetermined distance, so as to form a relay and increase the maximum distance for exchange of data between the identifier and the read and/or write device.