Feature: 1. Convenient NFC Wristband: This bracelet has an independent NFC function that allows for cardless access when going out, providing convenience. 2. Adjustable: Made of silicone material, this wristband is not only adjustable to fit all sizes, but also water resistant, and users can print logo on it. 3. Preprogrammed Chip: Each chip cards comes with a pre programmed unique ID, 4 byte UID that cannot be changed, ensuring data security. 4. Wide Application: These NFC wristbands are suitable for access controls, elevators, attendance systems, campus IDs, memberships, parking lots, and hotels, among others. 5. 4 Colors: This bracelet comes in four vibrant colors, red, yellow, blue, and black, making it a versatile accessory suitable for different outfits and occasions. Specification: Item Type: NFC Bracelet Chip Type: T5577ID Copyable Wristband Material: Silicone (Non poisonous and odorless)Working Temperature: -30 degrees C-220 degrees C Color: Red, Yellow, Blue, Black Application: Access Control, Elevator, Attendance System, Campus Card, Membership, Parking Lot, Hotel . Package List: 4 x NFC Bracelet