Proximity readers are access control devices that use radio frequency identification (RFID) technology to grant access to a restricted area. They work by emitting a low-frequency electromagnetic field that can detect RFID-enabled cards or key fobs when they are held within a certain distance of the reader. Proximity readers are commonly used in commercial and industrial settings where access control is necessary, such as office buildings, parking garages, and gated communities. They provide a convenient and secure way to control access to a restricted area, as they can be programmed to only grant access to authorized individuals. Proximity readers come in a variety of styles and can be either standalone devices or integrated with other access control systems. They are also often used in combination with other access control methods, such as PIN codes or biometric scanners, to provide an added layer of security. Overall, proximity readers are a reliable and efficient access control solution for a wide range of applications.