An RFID reader is a device that uses radio waves to communicate with RFID tags. These tags contain small chips that store information, which the reader can access when it is in range. This technology is commonly used in various applications, such as inventory management, access control, and tracking items. The RFID reader works by emitting a radio signal that activates the RFID tag. Once activated, the tag sends back its stored information to the reader. This process allows for quick and efficient data collection without the need for direct line-of-sight, making it a valuable tool in many industries.