Compatability: 1. Support 13.56mhz RFID and NFC IC reader/writer, For example:Acr122u reader/writer 2. Support Smart mobile phones with NFC function. Brand Smart phone: Sony, HTC, Samsung, Nokia, LG include blackberry,Nokia Lumia, Nexus4/10,Galaxy S4,and other mobile phone could support 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. 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 shooting 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.