Model 1800-080 offer a full capable cellular interface that provides both voice communication and programming via the AT&T 4G-LTE Cellular network.The DKS Cellular service is the only service that will allow you to "push" the programming data directly from your computer to the entry system via the cellular network - a true machine to machine (M2M) connection. The ability to push the data directly from the computer to the entry system via the cellular network makes the DKS Cellular service unique in the industry. Use the 1800-080 with the following DKS entry systems: 1833, 1834, 1835, 1837, 1838 with Remote Account Manager software Version 6.4 or higher.