In order for the device to work properly, and for all its functions to be available, the internet connection must 

 be always available.

In fact, when first switched on, DiCE CARE will search for available Wi-Fi networks. Using the app (downloadable from your app store), DiCE CARE must be connected to a Wi-Fi network that has internet access. This will allow you to download the necessary Firmware updates and configure the device.

DiCE CARE will be able to connect to the cloud via Wi-Fi to exchange upload and download data.

Wi-Fi allows a permanent connection to the internet through your home network.

The permanent connection to the internet is essential for controlling the connected devices as there is no local "smartphone to device" connection.