R300M series is my company design a new generation of access read head, with card reading distance, metal resistant capability and characteristics. It is based on the ISO / IEC14443A international standard protocol development of contactless smart card serial number reader. Radio frequency part by my company to design high performance RF card reading circuit; with high performance-price ratio, strong anti-interference ability, small volume, stable performance characteristics. Can provide 26, Wei Wei root root 34485 communication interface, applicable to access control, attendance, fees, security, patrol and other radio frequency recognition applications.