Compatability: 1. Support 13.56mhz RFID and NFC IC reader/writer, For example:Acr122u reader/writer 2. Support Smart mobile phones with NFC function. Smart phone: , , , , include blackberry, Lumia, Nexus4/10,Galaxy S4,and other mobile phone could support NFC function. Andriod system Phone could download the NFC software, such as the 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. 100% new and high quality Specifications: Chip: for Ntag215 Usable capacity: 504 bytes Protocol: ISO14443A Working frequency: 13.56 MHZ Reading and writing distance: 1 to 5 cm Reading and writing time: 1 to 2 ms Working temperature: -20 to 55 degree, humidity of 90% Erase times : more than 100000 times Data storage: more than 10 years Reading time: 100000 times Colour: white Material: PVC Size: about 25mm in diameter Package Contents: 10 * NFC Cards Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.