Radio-frequency identification reader or RFID reader is a device that is used to identify the location of objects with RFID tags in order to protect them from misuse or theft. An RFID reader has an antenna that catches signals from RFID tags. As soon as any object with an RFID tag exceeds a particular RFID range, the RFID reader issues a signal indicating the security staff about the mishandling or inappropriate use of the object.
Nowadays RFID reader is also used in hospitals for better management, and to prevent the theft of expensive instruments and medicines. Many hospitals also use RFID readers to reduce accidental patient swapping when they are transferred to the operation theatres.