The Radio-Frequency Identification Chip contains an electromagnetic field coil that regulates the exterior magnetic field in transferring the coded identification number when inquired by the reader device. The small chip is often implanted in pets and consumer products for identification.

Radio-frequency identification refers to the use of wireless and non-contact systems using radio- frequency electromagnetic fields in transferring of data from tags connected to objects, to help in automated tracking and identification. Some tags are run by electromagnetic fields that require no battery to read them. Some utilize local power sources in the production of the radio waves. The information stored in the tags can be read when you are several meters away. The main difference between the tag and the bar code is that it does not have to be along the line of sight. Also, it can be embedded in the object that is being tracked.

These tags are often used in many industries. For example, they are attached in automobiles when they are being produced. This helps to keep track of the production stage of the unit in the assembly line. The pharmaceuticals can also be monitored when they are being moved from one store to the other. Pets and livestock may equally have the tags injected in them to make identifying them simpler.

There is, however, a security concern behind using these RFIDs. Since they can be attached on possessions, clothing or implanted in people, there is a possibility of unwarranted parties reading the stored confidential information stealthily.