RFID Electronic Foot Rings are electronic devices specifically designed for animal identification and electronic management. They serve as automatically identifiable electronic identification tags for animals, allowing for convenient automatic identification of each individual animal using various types of dedicated readers. This provides the technological means for automating and digitizing many tasks in animal research, breeding, management, and surveys, such as individual identification, data statistics, movement tracking, automated feeding, and behavior management, significantly improving the ability to track and manage animals. They are widely used in the identification and tracking of poultry, electronic transactions, product identification, animal management, food traceability, poultry breeding, feeding/disease prevention, and pigeon racing quarantine, primarily providing traceability for animals and their food products.BWF23 adjustable leg ring is an open-ended, closed-loop RFI