Ease of operation: Ensure the device supports NFC functionality. After installing the corresponding application, select "write" or "enter data," then place the NFC card close to the device's sensing area for automatic data transfer to your phone. Avoid use in strong magnetic fields or on metal surfaces as this may affect performance. If issues occur, reach out for support. Safe Material: The round NFC card measures 25 mm in diameter. It is compact and features a durable PVC surface that is waterproof and stable. The back has an adhesive layer for easy attachment and storage, enabling long-term use. Data Storage: The chip provides 504 bytes of storage, offering sufficient space for your data. It includes a read/write lock function for secure information management. Wide range of applications: NFC cards are compatible with Tag M and all NFC-enabled Android phones and other devices. Suitable for use with outdoor mobile phones, tags, electronic label shelves, smart advertising, product authentication, and more. Multifunctional: Use NFC stickers to share social media information, electronic postcards, connect to Wi-Fi, launch apps, control smart devices, and more to enhance daily convenience. Color: White Material: PVC Package Contents: 1 set NFC tag Note: The package includes only the items listed above. Light reflection and display differences may cause slight variations between the image and actual product color. Measurement may vary by +/- 1-3 cm.