Radio-frequency identification (RFID) is communication via radio to identify an object (typically referred to as an RFID tag) applied to or incorporated into a product, animal, or person for the purpose of identification and tracking. Some tags can be read from several meters away and beyond the line of sight of the reader.
There is no global public body that governs the frequencies used for RFID. In principle, every country can set its own rules for this. Low-frequency and high-frequency (13.56 MHz) tags can be used globally without a license.