Seamless access for even the most complex facilities. The DKS 1838 Multi-door Access Controller is ideal for small businesses, office buildings, factories, industrial sites, apartment complexes, or for any application that requires access control and reporting capabilities. The 1838 is a 3000 user, 3-door Controller that easily expands to control up to 24 doors with Tracker Expansion Boards. This flexible System allows access control to 8000 Device Codes by means of Cards, Keypads, Wireless RF Transmitters, or with almost any 26-bit Wiegand Device.