K990 is a card based time attendance and access control terminal. It has a capacity of 1,00,000 cards and transaction logs with fastest identification speed of less than or equal to 0.1 second. The wiegand-in interface is used to connect external reader to construct master and slave system. The operation can be done on the device through LCD display, also can be done on PC software and upload to the device through TCP/IP, RS232/485 communication. It also has optional Wi-Fi and GPRS connectivity. The USB-host is used for data download and upload, including user template and record etc.