How RFID and lts Technology Work (Part l)

https://www.dtbrfid.com/products/rfid-bluetooth-reader.html

Radio frequency identfication, that is RFID technology, also known as electronic tag, radio frequency identification, is acommunication technology that can identify specific targets to read and write related data through radio signals withoutmechanical or optical contact between the identification system and specific targets. Commonly used RFID technologiesinclude low frequency (125k~134.2K), high frequency (13.56Mhz), ultrahigh frequency, passive and other technologies.RFID readers are also divided into mobile and fixed ones. At present, RFID technology is widely used, such as libraries,access control systems, food safety traceability, and RFID technology in supply chain management.