The Wave Radon, Wave Plus, and Wave Mini can store data locally for 80 days. Wave Enhance can store data up to 130 days locally.
Although our Wave monitors can store 80 days worth of data (Wave Enhance up to 130 days), we recommend syncing regularly with your devices through the Airthings app for optimum functionality of the monitor.
This will also allow you to get the best experience from monitoring your air quality.