... FR401Features:1.ergonomic design 2.wide touch screen, easy to operate, simple and stylish interface 3.used six function keys can be ... battery: 2000mAh 7.communication: TCP / IP, RS232/485, WIFI8.USB-HOST: two USB-HOST interface 9.attendance functions: external timer rings, daylight ... control functions can be optional12.Other optional functions: GPRS, serial print, Mifare Card, HID Card, iClass cards