All QuantAQ devices are designed to operate as internet-connected (IoT) devices and require an internet connection provided over the cellular network to work as intended.
If you temporarily lose connectivity, devices are designed to store and forward up to three days of data to handle outages. While it is technically possible to operate your device offline, it is not officially supported or recommended. You will not have access to the final computed gas and particle concentrations and the real-time clock will drift over time.