Chip: NFC215Usable capacity: 504 bytesProtocol: ISO14443AWorking frequency: 13.56 MHZ and writing distance: 1 to 5 cm and writing time: 1 to 2 Working temperature: -20 to 55 degree, humidity of 90%Erase : 100000 Data storage: 10 years time: 100000 Size: 86.5x54x0.8mmNFC IC reader/writer NFC Enable Phonecolor: WhiteMaterial: PVCCompatiability:1) Support 13.56mhz RFID and NFC IC reader/writer, For example:Acr122u reader/writer2) Support Smart mobile phones with NFC function.Package Contents:50 x cardOnly the above package content, other products are not included.Note: Light reflection 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store