Size: 30 x 30mm; Sticker surface is water resistant and heat resistant materials; Compatible with all NFC cell phones including Blackberry LG Nexus 4 Nexus 10 Samsung Galaxy S4 Xiaomi 3 MX3 etc; Easy operation it can be achieved by simply editing set the alarm make calls send SMS Bluetooth On / off switch mode open the page share business cards; With the same function with the Sony Xperia Samsung TecTile function; Label is blank with no data you can download some free software such as "NFC Task Launcher" to edit the label can be repeatedly erased Android NFC phone system can go to Google Play NFC reader to download the appropriate software Android Market where there are a lot of free software.