What is RFID?

RFID stands for Radio-Frequency IDentification.

RFID refers to small electronic devices that consist of a small chip and an antenna.

The RFID device serves the same purpose as a bar code on your purchase. It provides a unique identifier for that purchase. Similarly, the RFID device must be "scanned" to retrieve the identifying information.

RFID devices will work within a few feet of the reader. For example, you could just put all of your purchase from supermarket in a bag, and set the bag on the reader. The reader would be able to query all of the RFID devices and total your purchase immediately.

However, system must be set-up carefully to avoid reader collision. Reader collision occurs when the signals from 2 or more readers overlap.