High Frequency RFID Technology: Operates at 13.56MHz frequency with ISO14443A standard for reliable contactless communication Unique Pre-Programmed ID: Each chip card features a unique 4-byte UID that is pre-programmed and cannot be changed for enhanced security Compatible with Popular Readers: Works seamlessly with RC522 and PN532 RFID reader modules for versatile applications Adult Size Dimensions: Features a 60mm diameter designed to comfortably fit adult wrists Multiple Color Options: Available in black, blue, orange, and red colors with optional logo printing customization Waterproof Silicone Material: Constructed from durable waterproof silicone for long-lasting use in various environments
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