R502M is an integration of China Mobile 2.4G and mobile phone card, RFISM card access read head. It 2.4G card reader module using the standard 2.4G telecommunication module, 13.56MHz highly integrated RF chip, and the use of dual antenna, improve it to various types of card compatibility. Through the combination with different 13.56MHz integrated chip, so that the read head has strong all types of card reading function, can read Telecom mobile phone card, RFSIM card, the two generation ID card, and all kinds of comply with ISO14443A, B, ISO15693 protocol number. The read head may provide Wei root 34, Wei root 26485 communication interface, applicable to access control, attendance, fees, security, patrol and other radio frequency recognition applications.