Product specifications & features2-4 Samsung Electronics2-4. Main FunctionAs an Internet based device for centralized management of system airconditioner, supports LAN and WAN.It can operate for 24 hrs without extra computer.24 Hrs operation- Convenience with 24hrs, 365 day operation.Independent operation and Electricity saving- Executes Schedule control, Peak electricity control, and Integration power distribution and independently without extra computer.- Achieves Energy saving with no PC operation at all times.Data storage- Stores and check the list of malfunction, installation information of indoor unit and the data of integration power distribution itself with built-in database.Management of Large quantities units- The maximum 256 indoor units are connected to one DMS 2.5 realizing efficiency.Automatic e-mail- Sends a e-mail automatically with the list of malfunction to pre-registered address when certain problem occurred.Web-server- You can use various function remotely without extra program.(Unit condition monitoring, Function control, list of malfunction, schedule setting etc.)Linkage with upper-controller- You can use one central management system with upper-controller (S-net series) combining many DMS 2.5s.All manuals and user guides at all-guides.com