Size: The package contains high-quality NTAG216 NFC tags with a diameter of 25 mm/1 inch. Chip: NTAG216 chip, with 888 bytes of memory, readable, encrypted, and locked, with faster read and write speeds and larger storage capacity. Lifespan: 10 years, 100,000 frictions. Material: The circular label is made of environmentally friendly PET material. The surface is smooth, wear-resistant, and shiny. Circular stickers have stickiness and are easy to attach to the surface of most items. (Not supported on metal surfaces and strong magnetic fields). Compatibility: Compatible with TagMo and all Android phones and other NFC-enabled devices. You can use NFC tags to quickly share social media, music, business cards, connect to Wi-Fi, create a smart home, and more. By providing enough storage space, you can quickly write down the information you want, making life more colorful. Color: As Shown Material: pet Package Contents: 50 x NFC tags 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 to be slightly different from the real one. The allowed measurement error is +/- 1-3 cm.