DreamStation cellular modem replacement. Required for remote data reading/setting changes.
The cellular modem sends the data via cell phone tower to the manufacturer with encrypted connections. Your CPAP service provider or doctor can read the therapy report from their office. They can also push notifications (eg., change filters), run remote diagnosis, or change settings.
This modem comes an optional oximetry sensor sending data to your doctor, so they have complete therapy data for better CPAP machine adjustments.