Chiptronics Solutions Provides complete solutions in door access products. 4 Door Controller can control up-to 4 doors with 8 wiegand Input, 4 Exit Switch Input, 4 EM Lock Control, 4 Door Sensor input. This controller can be expanded with 4 type of alarm panel. It has 26000 User Capacity. Controller also support Anti-pass Back, Door interlock in variuos combinations, Multi Card Open Function, Time Zone and many more features.