RFID = Radio Frequency Identification
Radio frequency identification is non-contact automatic identification technology.

What function of RFID ?
Wide range of applications, the most common applications as below:
Access Control  and Management
Product recovery
Stock management
Medical : medical record; case history
Dangerous Goods storage and management
Ticketing , VIP cards , fund cards …etc.

RFID classification
low frequency(LF)
high frequency(HF)
Super high frequency UHF)
Microwave
RFID System components
Four parts of RFID：
Tag： Composed by the coupling element and the Chips ,the tag contains different ftrquency of antenna for communication and insert data.
Reader：Label device for both Read & create data.
Antenna： Signals transmitted between the tag and reader.

Benefits of RFID
1) Recycle (Save cost)：
RFID systems can be recycled and freedom to create the information , higher durability than the paper sticker.
2) Large data capacity
Without limited the data amount for the product increasing amount of data.
3) Durable
Paper sticker get damage or dirty very easily but RFID resistance to water, oil or stains.
RFID can read the data no matter in a dark place or dirty environment.