This product is designed for cell phones with the NFC function. Simply stick it on your phone. You can do so much! Here are a few examples: Set alarm clock， dial a call， send message， open or close bluetooth， switch mode， browse website and even share your business card as as long as your mobile phone touch the NFC chip. It's simple to use， convenient and demonstrates the true power of NFC. These stickers can be re-written up to 10，000 times.

Main Features:
● 168 Bytes memory， 144 Bytes usable memory
● 10，000 rewrites， 10 years of data retention
● 13.36MHz， 106 kbit/s
● Working distance: 2 - 5 cm

Note:
Reading range depends on environment and power.