R390E 13.56MHz, 125KHZ non-contact radio frequency card issuing device, which is based on ISO / IEC14443A international standard protocol development of contactless smart card device. 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 the serial communication interface, USB, HID, applicable to access control, attendance, fees, security, patrol and other radio frequency recognition applications