... /485, TCP/IP, USB communication. 2.HID / Mifare card, 2G SD card, GPRS, Wifi, and printer optional. Technical Specification:· User Capacity ... combination Authentication Modes)· I/O interface: RS232/485, TCP/IP, SD memory card slot (Standard 1G), USB Host & USB Client. · Standard ... Bell, T9 Input, Self-Service Query· Options: HID / Mifare card, 2G SD card, Web server, Work code, WIFI, GPRS, Printer, RIS ...