[Chip Function] Manufacturing process strictly follows protocol /IEC 50443A. Features 504 storage capacity and read-write lock function, with read-write times of only 1-2 ms. Data can be stored for over 10 years and supports more than 100,000 erasures and writes. [Size and Material] Card size is credit card sized. Made from high-quality PVC material, it's robust, waterproof, drop-proof, and bend-resistant, perfectly protecting the internal chip for long-term use. Each NFC card comes with an individual protective bag. [Blank White NFC Card] The printable surface allows for personalization according to your needs. It's compatible with most photo ID card printers, such as for Zebra, for Evolis, for Fargo, for Canon, for HP, for Nisca, for NBS, etc. NOT suitable for inkjet printers. [Compatibility] Compatible with TagMo (Android NFC-enabled smartphones) and Placiibo/Amiiboss/Amii NFC (iOS). Suitable for all NFC-enabled smartphones and devices. [Wide Range of Applications] Can be used for check-ins, mobile payments, product information inquiries, mobile identification, mobile marketing, social networking, business card sharing, access control, membership management, book lending, etc. Sensing distance: 0 - 10 cm (actual distance depends on sensors). Quantity: 50 pcs Color: White Material: Plastic Size: 85.5x54.5mm Package Contents: 50 * cards Only the above package contents are included, other products are not. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The allowed measurement error is +/- 1-3 cm.