RFID, Radio Frequency Identification, is a form of wireless communication that uses radio waves to read, capture, and interact with information stored on a tag. RFID devices are used as a substitute of bar code or a magnetic strip which is noticed at the back of an ATM card or credit card, it gives a unique identification code to each item. And similar to the magnetic strip or bar code, RFID devices too have to be scanned to get the details.