OC500 proximity card time attendance and access control is standard USB Device, USB Host, TCP/IP, optional RS232. Dry contact , Wiegand26 input and output. 6-digit work code, 15 groups, 32 time zones, 30 bell schedulers and 50 short messages. OC500 has standard TCP/IP module. It has multiple identification methods such as card only, ID+password, password+card. Two in one: time attendance and access control function.