SC503 is an access control device produced by ZKTeco, which is made with elegant design and professional surface treatment. The device has lock control, alarm, exit button and door sensor. The wiegand-in interface is used to connect external reader to construct master and slave system. Also, the device can be used to connect with a control panel as a reader by wiegand-out interface. The operation can be done on the device through LCD display, also can be done on PC software and uploaded to the device through TCP/IP, RS232/485 communication. The USB-host is used for uploading and downloading data, including user template and record etc. SC503 is suitable for house, small office.