Anti Metal type, fit for paste on Metal material, for example, Phone or computer or others. Compatiability: Support 13.56mhz RFID and NFC IC reader/writer, For example:Acr122u reader/writer Support Smart mobile phones with NFC function. Andriod system Phone could download the NFC software, such as the Google play NFC Task Launcher, NFC ReTag Pro Security Software. Application: Check in, mobile payment, product information query, mobile identification, mobile marketing, social networking, business card sharing, access control, membership management, posters, healthcare,book borrowing etc. Parameter: Chip: Ntag215 Diamet: 30mm Usable capacity: 504 Bytes Protocol: ISO14443A Frequency: 13.56 MHZ Packaging materials: PE self-adhesive + coated paper Erase times: > 100000 times Data storage: > 10 years