Chip type: NXP MIFARE DESFire 8K Operating frequency: 13.56MHz Memory size: 8000 bytes Read range: 0 - 3cm Material: PVC Operating temperatures: -40 to +65 degree centigrade Read/write times: 100000 times Compatibility: for Samsung Galaxy S5 / S4 / Note3 /N ote2 Nokia Lumia 920 / 820 / 720 / 620 BlackBerry Z10/Q10 LG Nexus 4 / Nexus 5 HTC one Sony Xperia and all NFC enabled mobile phones Size: 8.6 x 5.4cm How to use: (An example as a business card) Please pre-install the "TagWriter" on your NFC cell phone before use. You can download it from Google Play