A significant improvement of RFID devices over their counterparts is that they do not need to be kept exactly in contact with the scanner. Unlike bar code, credit card or ATM card, RFID devices can work within some feet of the scanner. The distance is maximum 20 feet for the devices that are having high frequency.
For example it is possible to keep all your purchases or groceries in a bag and put it on the scanner. The total purchases will be calculated instantly since the scanner will connect the RFID devices. You may search for the RFID chip timing Newport News Virginia on the Internet for getting more information on this.