The WALLi and SmartLid combine to make a blue tooth fill station. The WALLi connects to a pressurized fluid source (hose bib) and communicates with the SmartLid to stop the flow when filling a dispenser or other container. A blue tooth enabled float is connected to each SmartLid. If, for some reason, the communication between the WALLi & the SmartLid is interrupted the fluid flow will stop.
You can set the WALLi & SmartLid to fill a container and walk away knowing it will stop the flow when full!