How-To Geek


RFID (Radio Frequency Identification) is a wireless non-contact data transfer system used for identification and tracking. The RFID chip is a small electronic module roughly the size of a grain of rice that contains a unique serial number and other information about the object to which it is attached. This information can be read over short distances (several meters or less) via special RFID readers which emit the proper radio frequency to both activate the chip and read the resulting transmission from the chip.

RFID has several distinct advantages over previous tracking methods (such as bar and QR codes) in that it does not require a line of sight and each RFID tag is unique and thus can be serialized. RFID chips are used in everything from factory stock management to no-stop toll payment systems.

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