IDs give a proper identification to each and every employee.  RFID is one such ID that is very helpful. The RFID (Radio Frequency Identification) label has an IC (integrated circuit) and an antenna, which are inserted in the transponder. The IC has a unique electronic product code (EPC) that differentiates the tagged item from other RFID labels.

They track down the whole record and strengthen the security system. When a person having the tag comes in the range of RFID reader range, information is passed by the help of antenna and then it is read by the master computer. There are two kinds of RFID tags:

1. Inductively coupled RFID tags
2. Capacitively coupled RFID tags

ID printers are also available in different ranges and have different set of qualities. They can be used for single side printing, double side printing, single color, full color, magnetic strips or barcode reading. The printer may have an image printing facility that can be used in printing various images on the plastic ID cards.  

To read out the product information and take image of the barcode, and two important devices are in use, and they are laser scanners and imager scanners. An imager scanner reads barcodes and works like a digital camera – a most beneficial tool for proper ID verification.

It is, however, different from the laser scanner as it can read 2 D (two dimensional) figures or symbols. The imager gives back a ruptured light of the barcode and sends it to an eye-like camera, which takes the picture. Unlike laser scanner it does not interpret the barcode and just clicks its image.