Different devices occupy different resources of the Hub. The following is the theoretical device limit of the Hub: Sensors/Buttons: Up to 64 Switches: Up to 32 Radiator Valves: Up to 32 You can control multiple hubs from one account. Devices can only be paired to one hub at a time. There are 3 kinds of connection states of the hub, including Light, Moderate, and Dense. For optimal performance, avoid connecting more devices when the connection is Dense. To get to know more details of each function and configuration please go to Download Center to download the manual of your product.