Feature:1. Standalone NFC Functionality: This wristband features an independent NFC function, making it easier than ever to go out without needing to bring cards, convenient and practical.2. Adjustable Size: The wristband is designed with flexible sizing, allowing for a comfortable fit on any wrist. It is made from silicone material which adds to its lightweight nature.3. Wide Applications: The bracelet can be utilized in many fields. Suitable for access control systems, elevators, attendance systems, campus cards, membership cards, parking lots, hotels, etc.4. Water Resistant: The bracelet is not only designed for comfort, but it's also water resistant. This feature makes the wristband ideal for use in all types of weather conditions.5. Reliable and Stable: Works in temperatures ranging from -30C to 220C with colors available in red, yellow, blue, and black. Reliable use without fear of damage or loss of function.Specification:Item Type: Rewritable IC Wristband Chip Model: T5577ID Rewritable WristbandMaterial: Silicone (safe, odorless)Working Temperature: -30C to 220CColor: Red, Yellow, Blue, BlackApplication: Access Control, Elevator, Attendance System, Campus Card, Membership, Parking Lot, Hotel.Package List:4 x NFC Wristbands