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Radio Frequency Identification, commonly known as RFID, is an automatic detection method that makes use of RFID tags.  Information is stored and retrieved using RFID tags or chips or transponders. More plainly explained, an RFID tag is an object or a device that can be attached to a product and/or embedded in a person or an animal to identify it with the help of radio waves.

How do RFID Tags function?

RFIDs have been designed to track an individual by the merchandise that is carried inside or outside a store, quite beyond the point of sale. This can include clothing, cosmetics, and food items and practically anything manufactured. These tags can be tiny radio responders or they can be quite big depending upon the purpose of its use and its price. These tags or chips can be attached to anything for account, theft prevention or shoplifting as is more common today and other such purposes. They function in the same manner as devices like “EZPass” and "SpeedPass" that allows one to pay tolls and purchase gas without any communication. A radio signal transmitted provides the power, and the transponder answers by transmitting out a serial number in a radio reaction.