RFID stands for Radio Frequency Identification. It is a generic term used to describe a system that transmits the identity (in the form of a unique serial number) of an object or person using radio waves. RFID is designed to enable readers to capture data on tags and transmit it to a computer system without the need for physical contact.
The tag’s information is stored electronically and includes a small RF transmitter and receiver. An RFID reader transmits an encoded radio signal to identify the tag. The tag receives the message and responds with its identification information. The read time is typically less than 100 milliseconds.