Chip type: NXP Ntag203 Operating frequency: 13.56MHz NFC Tag (Inlay) Size: diameter 28mm Stickers Size: diameter 39mm Memory size: 144 bytes Read range: 0~20mm Material: PET 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 How to use: (An example to DIY a NFC Tag to turn on / off Wi-Fi) Please pre-install the "NFC Tasks" and "NFC Tools" on your cell phone before use. You can download them from Google Play.