Ease of operation: Make sure the device supports NFC functionality. After installing the corresponding application, "write" or "enter data", put the NFC card close to the device sensing area, and the data be automatically entered into your phone. Please note that it is not suitable for use in strong magnetic field environments and on metal surfaces, which its functionality. If it doesn't work, please contact us. Safe Material: The size of the round NFC card is 25 mm in diameter, small and , the is made of PVC material, waterproof and stable, the back is sticky for easy fixing and storage box, and it can be used for a long time. Data Storage: The chip has 504 bytes in stock, providing you with enough storage space and has a read/write lock function to quickly write the information you want. Wide range of applications: NFC cards are compatible with Tag Mo and all NFC-enabled Android phones and other devices. Outdoor mobile phones support tags, electronic label shelves, smart advertising, product certification, etc. Multifunctional: You can use NFC stickers to share social information, electronic postcards, connect to wifi, play games, etc. to create a smart life. color: White Material: PVC Package Contents: 1 set nfc tag Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.