Manufacturing process strictly follow the protocol /IEC 50443A. It has 504 storage capacity and read-write lock function, the reading and writing time only need 1-2ms, data can be stored in more than 10 years, and more than 100000 times of erase and write.cards, each card is the size of a credit card. Made of PVC material, waterproof, drop-proof, fold-resistant, protect the internal chip. Each NFC card with bag individual packing.The printable surface allows you to personalize your NFC card according to your needs, it can be by most photo ID card printers, such as for , for , for , for , for , for Nisca, for NBS & etc. NOT use for inkjet printers.Compatible with for TagMo(Android NFC-Enabled Smartphones) and for Placiibo/Amiiboss/Amii NFC (iOS). Suitable for all NFC enabled smartphones and devices.Can be using for check in, mobile payment, product information query, mobile identification, mobile marketing, social networking, business card sharing, access control, membership management, book borrowing etc. Sensing distance: 0 - 10 cm specific actual distance related to sensorsQuantity:50 PCSColour:WhiteMaterial:PlasticSize:85.5x54.5mmPackage Contents:50 * cards