Welcome to our store! 1. Excellent Performance: Our NFC RFID tags have a 504-byte memory design with read and write lock functions, offering excellent performance. This set includes 50 tags, perfect for daily use. 2. Security and Authentication: NFC RFID tags are commonly used for contact information, such as providing your contact information or business details, and for security and authentication purposes. 3. Waterproof Function: Our RFID tags have a strong waterproof function, resistant to corrosion, and offer high durability. 4. Hang on Keyring Available: Our NFC RFID tags are small and delicate in appearance, making them easy to hang on a keyring, perfect for carrying around. 5. Wide Application: Our NFC stickers are suitable for access control, hotel door locks, employee attendance, and campus access control, and payment control, and more. Product Type: UID Tag Material: Copper Alloy Operating Frequency: 13.56MHZ Detection Distance: 0-10 cm (dependent on reader) Working Temperature: -20 - 55 ℃, 90% humidity Re-encoding Times: Over 100,000 times Data Storage: Over 10 years Reading Times: 100,000 times Diameter: Approximately 25 mm / 1in 50 x NFC RFID Sticker Tag