An RFID system consists of a tag, which is made up of a microchip with an antenna, and an interrogator or reader with an antenna. The reader sends out electromagnetic waves. The tag antenna is tuned to receive these waves. A passive RFID tag draws power from field created by the reader and uses it to power the microchip’s circuits. The chip then modulates the waves that the tag sends back to the reader and the reader converts the new waves into digital data. New mobile readers are able to connect to smartphones and tablets running on apps via Bluetooth. This allows the smartphone or tablet’s’ processor and data connection to process and upload the data to the web. This advancement has allowed systems to be much more mobile and easy to use.