Epoxy keychain NFC NTAG215

From the shop's description

Conventional NFC Tags don’t work when applied to metal surfaces. Because NFC tags work by electromagnetic induction, metal can easily interfere with their operation. On-metal or Anti-metal NFC Tags are specially manufactured with a protective layer made of ferrite, so that they can work also if stacked directly to a metal surface. COLOR : Blue NFC Tag (Sticker) Features Chip: NTAG215 (compatible with all NFC enabled smart phones) Size: round with diameter 30 X 50 mm Material: EPOXY Color: BLUE Protocol: ISO/IEC 14443A Function: read and write Reading distance: 20 mm WATERPROOF Applications OF NFC Payments (banking) Transportation (Ticket) Access control (hotels, companies, …) Events (exhibits, important events, invitation cards) Business cards Hospitals (Patients data) Farms (Animal and planets identification) Show Rooms (items data) Shipping (product shipping history and specifications). NFC TAG (Sticker) read/write tutorial using NFC module NFC Forum