A passive RFID system is made up of a few parts. A reader is a two way radio transmitter/receiver that connects to an antenna to send a signal to the tag. A tag consists of an integrated circuit which stores and processes information, attached to a tag antenna (typically aluminum) that can be converted into a variety of different finished formats such as a label, ticket, or durable tag. The reader sends a RF signal to the tag and the tag uses the power from the reader signal to power up and exchange information.