Compatiability:1) Support 13.56mhz RFID and NFC IC reader/writer, For example:Acr122u reader/writer2) Support for Smart mobile phones with NFC function.tware. 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.50pcs NFC Wet Inlay TagChip: Ntag215(504bytes) Protocol: ISO14443AWorking frequency: 13.56 MHZReading and writing distance: 1 to 5 for cmReading and writing time: 1 to 2 msWorking temperature: -20 to 55 degree, humidity of 90%Erase times : > 100000 timesData storage: > 10 yearsReading time: 100000 timesDiameter: 25mm Note:1.Transition: 1cm=10mm=0.39inch2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank youPackage includes: (No retail package)50PCS X NFC Sticker for Key Tag