RFID or radio frequency identification technology involves same thought like barcode systems but RFID is more powerful compared to barcode. Tags or chips are used in RFID technology. RFID readers can directly access those tags to get information stored into them. Two tags are there such as active and passive tags.
Active tags are more expensive compared to passive tags since they have built-in battery to transmit the data to the RFID reader. You may search for the RFID chip timing Warren Michigan on the Internet to know more about this.